Searching for tadpoles in Arroyo Viejo Creek at the Oakland Zoo.

It Day #2 of Nature Play, a new Oakland Zoo ZooCamp program that I have been assigned to teach. I know all about “Nature Deficit Disorder” and “No Child Left Inside”. I have read “Last Child in the Woods” and even blogged about the issues, but now I find myself out in nature with 12 curious and excited children, and I have no idea what will happen.

Nature Play was created in response to childrens’ desire to experience true nature – to look up at trees, observe tadpoles and connect with wildlife in their own backyard. The idea behind Nature Play is to offer the campers supervised and loosely facilitated exploration outdoors that is self directed.

Parents were so game to give these simple pleasures to their children, this program sold out.

Now, here we are. Our afternoon agenda is creek time and fort building. It is a beautiful afternoon at Arroyo Viejo Creek, a small tributary that runs through the zoo grounds. Though there are tigers, lions and elephants close by, this is where the campers are most excited to be. I have given minimal direction: look, listen, smell and feel, and record something in your nature journal. They have nets, jars, binoculars and wildlife guides, and one hour.

Immediately the group swarms to their favorite spot that they discovered yesterday. It is near one of the outdoor classrooms and features a giant, ground-leaning willow tree to crawl under, two logs that rest across the creek to climb over and water loaded with tadpoles and water gliders. I watch and listen myself.

“There are 1000 water striders here! They are riding on top of each other.” “No, that is a shadow”. “I am crossing the log by scootching” “I will help you”. “I found a secret trail!” “I am putting this leaf in my journal”. “I can write with a rock.” “I heard a frog!” I am a frog!” “The sun makes me silly and happy.” “I see tadpoles!” “Let’s call this place Willow Cove.” “I don’t want to go home.”

A few things amazed me about this hour. One, they were never bored. They went on and on with their play and exploration in this small area with gusto the entire time. They were imaginative, inventive and stimulated. Two, they learned. They learned that frogs are quiet when they are noisy. They learned that they could balance better holding their arms out. They did not need my fascinating animal facts to gain knowledge. Three, they truly and intuitively cared about the habitat. They picked up a couple of pieces of garbage, told each other not to handle amphibians and put rocks back where they found them without being told. Four, and most interestingly, they got along fantastically. Earlier in the day there were a few squabbles over this or that, but out here, they helped each other, supported each other and shared the nets like pros. They seemed to be at peace.

A little later at Fort Building, the group divided into two as they followed two natural leaders and their fort visions. As we debriefed about the two forts, they came to the conclusion (themselves) that tomorrow they should build one fort with all the materials, then sit in it and tell stories about animals.

I saw it all with my own eyes. This nature stuff works. Now this explorer is going to sleep. I am exhausted!

Are you using Twitter or other social media as a way to promote progressive causes like energy efficiency? What do you think about mandatory home energy audits or line drying clothes versus machine drying? Source image: Tina KellerSomebody close to me recently turned 50. Okay, it was me who just turned 50. My how things have changed since 1959! My first experience with computers was as a freshman lining up to hand over my punch cards to the computer operator to be fed into a computer that filled a room. Up until recently I got my news of the world through newspapers and television. For most of my life I stayed in touch with distant family and friends through letters and phone calls. When my brother was in Vietnam during the war we had to call him through short wave radio to tell him that his Corvette got smashed. (He didn't care. He was relieved that we were all okay.)

Now I get my information mostly off the Internet and through Twitter, the social media service that is in the news because of its use by the opposition parties in Iran. Twitter is like snail mail cubed. You send messages from your computer or smart phone that immediately show up on the computers or phones of all your "followers." You get followers generally by following others. It's kind of an unwritten rule that if someone is following you should return the favor. So far I am following about 30 people or groups and have 11 followers. But I just started.

I am following Energy Circle, a new Internet resource that is using social media to report news about home energy efficiency on Twitter. A recent "tweet" connected me to an article by Peggy in Toronto who thinks that mandatory home inspections should be replaced with mandatory energy audits upon the time of sale of a home. Advanced Energy's Research Director Melissa Malkin-Weber, tweeted "Energy saving smugness nixes scratchiness of air dried sheets. But don't ask my kids about how those stiff cloth diapers felt."

I agree with Peggie and Melissa. But what do you think about mandatory home energy audits or line drying clothes versus machine drying? Are you using social media as a way to promote progressive causes like energy efficiency? You can respond below, and your response needn't be limited, like "tweets" are, to 140 characters. Or sign up for a Twitter account and join the conversation at KQED Science!

Hydrogen is not exactly a fuel. That is, we don't burn it to make energy. It's used more as a medium for storing and transporting energy.

The science of hydrogen fuel cell systems is based on a simple concept. When you combine hydrogen with oxygen, energy is released. You get electricity. What makes it such a clean technology is that the byproducts of that chemical reaction are just heat and water.  So when a fuel cell takes hydrogen from a fuel tank and combines it with oxygen in the air, it produces electricity and emits only a wisp of heated water vapor from the tailpipe.

Hydrogen is combustible (remember the Hindenburg?), and needs to be handled carefully. However, there are easy ways to demonstrate electrolysis, which breaks water apart into oxygen and hydrogen, and the opposite process of joining those chemicals. In fact, you could make a type of fuel cell in your kitchen, with a popsicle stick, battery clips, Scotch tape and a few other household products. You do need one item that can't be found in your kitchen: platinum wire or platinum-coated nickel wire.

Hydrogen is the most abundant element in the universe. And hydrogen fuel cell conversion is a squeaky clean technology. But the production of hydrogen for use in fuel cells — that can produce a lot of carbon dioxide. In fact, most hydrogen is currently made by stripping, or re-forming, natural gas. That's one of the ongoing criticisms of fuel-cell technology, that it generates greenhouse gas emissions just to get the hydrogen in the first place.

Fuel cells also can store energy generated by solar-powered electrolysis, as well as similar energy generated by wind and hydropower. That's the kind of hydrogen generation that advocates hope to eventually use in fuel cells. But being able to store energy also makes it extremely attractive to harnessing wind, solar and hydropower.

For example, California could generate a lot of wind energy at night, but since electricity has to be used right away, that nighttime, offpeak energy is less valuable. But if it could be stored in a fuel cell through the electrolysis process, that would make it much more lucrative.

Listen to the Where's my Hydrogen Highway? radio report online, and watch our Web Extra Slideshow.

Which is worse for you, a can of tuna or a broken CFL bulb? Sorry, Charlie… image by Dave LifsonA paper expected to be published in the August issue of the lighting industry journal, LD+A, may quiet some of the controversy over the dangers of mercury in compact fluorescent lights (CFL). I’ve argued in this blog that the cut in mercury emissions from power plants due to the electricity saved when traditional incandescent bulbs are replaced with CFLs, greatly outweighs the amount of mercury that could escape from broken CFLs, plus what is emitted during the making and transportation of CFLs. But the paper, by Robert Clear, Francis Rubinstein, and Jack Howells, who do research at Lawrence Berkeley National Laboratory (LBNL), goes a step farther by showing that even a person who breaks a lamp is more at risk from mercury in the environment than from the mercury in the lamp itself.

The researchers point out that there is a distinction between the kind of mercury that you are exposed to from broken CFLs—elemental mercury—and the mercury emitted from power plant smokestacks after it finds it’s way into waterways and oceans, where it becomes methyl mercury. Methyl mercury accumulates all up the food chain, so that large fish like tuna can contain a lot of it. Methyl mercury crosses the blood-brain barrier and passes through a pregnant woman’s placenta to her fetus. Methyl mercury is responsible for developmental problems, while elemental mercury, which is inhaled, appears to be more of a hazard for adults and children, and only then in the case of severe or prolonged exposures. In most mild cases, when the elemental mercury exposure ends, the bad effects diminish and go away. This is unfortunately not true for the developmental problems caused by methyl mercury.

The startling conclusion of the paper is that in a worse case scenario—you break a CFL in a closed, unventilated room; you vacuum the carpet, throwing mercury into the air; you set the vacuum in a corner; and then sit in the room breathing for eight hours—the amount of mercury exposure is about equivalent to the exposure you’d get from eating a can of Albacore tuna.

Eating a can of tuna has positive health effects as well as the negative health effects from the mercury. There are no positive health effects from a broken CFL, and you can reduce your exposure. The researchers suggest that in the case of a broken CFL, you should immediately open a nearby window. You can limit contamination by gathering up the large pieces of the broken bulb into a bag and set the bag outside. The room should then be left to air out for an hour or so. If the lamp broke on a carpet you can vacuum, but it should be done quickly while the room is being ventilated, the vacuum cleaner should be removed to an outside area, and again the room should be left vacated for an hour or so. Once the vacuum cleaner has cooled, you can empty the contents of the vacuum cleaner bag into the bag with the broken bulb. Take the bag to your nearest recycling center.

The Farallones consist of a group of rocky islands that are 28 miles North of San Francisco Bay.A national wildlife refuge just outside the San Francisco Bay is now under surveillance! The California Academy of Sciences in partnership with U.S. Fish and Wildlife and PRBO Conservation Science has installed a web camera on the Farallon Islands.

The Northern Farallones were originally granted protection by President Teddy Roosevelt in 1909. However, these islands were not always protected. Human consumption decimated many populations, some never to return. The demand for fur, oil and meat devastated the elephant and fur seal population. By 1900, the robust Common Murre population dwindled down to a few thousand because of the demand for Murre eggs.

Today, the Islands are further protected under the Marine Life Protection Act and the Farallones are also deemed a state marine conservation area. The majority of visitors of the human persuasion are not allowed access to the islands as they would upset the balance of the largest seabird breeding colony in the United States. Those humans that do frequent the island include wildlife biologists and land managers who are conducting wildlife research.

PRBO Conversation Science has been a local on the island day and night conducting research and monitoring the natives. The webcam helps their cause by collecting scientific data from a remote location. The camera enables biologists to observe without disturbing wildlife or incurring adverse environmental impact.

The water surrounding the islands makes this an ideal stomping ground for marine life and seabirds alike. Coastal upwelling takes place in the spring around the islands. The Coriolis Effect along the coast drives surface waters away from the coast; this water is then replaced with the denser waters from below. Within the deeper waters is a wealth of nutrients that are photosynthesized into dense blooms of plant plankton when exposed to the sun. This energizes the marine food chain as the plant plankton is eaten by krill. Krill is then made available to eat for fish, birds, and marine mammals. It does not only feed surrounding wildlife but growing human populations as well. The most productive fisheries in the world are supported by coastal upwelling. Given the location and the diversity of wildlife, the Farallones is well worth protecting.

The webcam not only aids research; it assuages curiosity. Anyone can pilot the camera. A panoramic view of the island is set up for the user to navigate and explore. Field guides and information on the project are also given on the site to reference observations.

As this radio story airs, Congress is debating two Cash for Clunkers proposals, one from the Senate and one from the House of Representatives. (A third proposal, also from the Senate, is almost identical to the House version.) Both would pay consumers to scrap their "clunkers" in exchange for brand-new, more fuel-efficient models. Both define "clunker" as a car that gets less than 18 miles per gallon. But after that, they diverge.

The House version comes from Democrats on the House Committee on Energy and Commerce. If it passes, a consumer would get a $3,500 voucher for trading in a truck with 15 miles per gallon in exchange for buying a new truck that gets 16 miles per gallon - a one MPG difference. (If the new truck got 17 miles a gallon, the consumer would earn $4,500). That's why environmentalists complain that the legislation is more about stimulating car sales than it is about getting gas guzzlers off the road.

The Senate version proposed by U.S. Senators Dianne Feinstein (D-Calif.), Susan Collins (R-Maine), and Charles Schumer (D-N.Y.), puts the bar a bit higher. In order to qualify for the $3,500 voucher, that same replacement truck would have to get 20 MPG - five miles per gallon more than the old truck. (An improvement of seven miles per gallon would earn the consumer a $4,500 voucher.)

Interestingly, this is a compromise even for Senator Feinstein herself. Check out her original, more stringent, Cash for Clunkers bill here. Proposed in January, it required stricter efficiency from the replacement vehicle, and would have allowed consumers to use their vouchers for used cars, or for public transit. Those conditions were junked, presumably, because they don't stimulate new car sales.

This article from the Christian Science Monitor, takes the number crunching even farther. Among the details worth considering is the "carbon cost" of making all these new vehicles that consumers will be enouraged to buy, should C4C pass: between 3.5 to 12.4 tons of CO2 per vehicle, according to a Duke economist.

Listen to the Cash for Clunkers radio report online.

Volunteers have a whale of a time working to save our seas. Join the fun this weekend!

Friday may be National Doughnut Day, but the real party this weekend is on June 8th in celebration of World Ocean Day. WOD, the brainchild of our Canadian brethren, is a worldwide effort to raise awareness and promote personal connection with the oceans that sustain life on this planet. Because we are lucky to have the ocean as our neighbor here in the Bay Area, there are a number of incredible events surrounding the celebration:

Ocean Beach Cleanup
When: Sunday, June 7th, 10 AM -12 noon
Where: Ocean Beach at the Judah Street Entrance, San Francisco
OceanHealth.Org teams up with the San Francisco Chapter of Surfrider for our annual World Ocean Day beach cleanup in San Francisco at Ocean Beach. There will be gloves and bags. Just bring yourself and dress for variable weather. The event is co-sponsored by the California Academy of Sciences & the Aquarium of the Bay.

I have quite the personal connection to SF’s Ocean Beach. For the past 2.5 years, I have led the Ocean Beach Foundation, working to preserve the beach with the fire pit installations as well as organizing weekly cleanups. It’s quite amazing what you can find out on the beach during cleanups…I’ve found everything from a huge Barbie dollhouse to an old school Radio Flyer (the toy of my youth!). I hope you’ll take part in the Ocean Beach cleanup.

World Oceans Day Film Festival
When: Wednesday, June 10th, 7-10 PM
Where: Victoria Theater, San Francisco
OceanHealth.org is celebrating World Ocean’s Day by screening a few short ocean films. We hope that you'll join us in this great location to share our love of the oceans and to view a variety of films showing perspectives on the ocean.

Purchase advance tickets at http://www.victoriatheatre.org or purchase tickets at the box office on the day of the film. Cost $10.

Some of the great films you'll see:
A Sea Change, End of the Line, Silent Snow, Keeping Coast, Favela Surf Dreams, Papa Tortuga, Revolution of the Crabs

Sustainable Seafood at Cal Academy’s Nightlife
When: Thursday, June 11th, 6-10 PM
Where: California Academy of Sciences, San Francisco
The Academy and its partners in the San Francisco Seafood Watch Alliance are pulling out all the stops to encourage visitors to make sustainable seafood choices.

Local celebrity chefs will whip up tasty treats during sustainable seafood cooking demonstrations: Eric Magnani from Global Gourmet Catering, Kin Lui and Casson Trenor from Tataki Sushi & Sake Bar, Craig Stoll from Delfina, and Loretta Keller from COCO5OO and The Moss Room. Also, we’ll host a screening of “The End of the Line,” a new film about overfishing that received rave reviews at Sundance.

Nightlife often sells out, it is suggested to buy your tickets ahead of time.

For even more events, check out OceanHealth.org

Ain't love grand? Once courtship and mating are over, the female hornbill finds a tree hollow and seals herself in with dung, fruit and pellets of mud.

I love our hornbills. Situated in the Rainforest section of the Zoo, between our gibbons and our chimps, they are often overlooked, yet I find them fascinating.

The female has the bright blue gular pouch (an expandable throat sac, used for short-term storage of food) and the male has the pale yellow version.  Like all hornbills, they have a distinctively large and down-turned beak.  These Malayan Wreathed Hornbills are one of the 54 species found in Asia and Africa.

Their dramatic nesting ritual is what makes them so interesting. Once courtship and mating are over, the female finds a tree hollow and seals herself in with dung, fruit and pellets of mud. The male gathers the pellets from the forest floor and swallows them, later regurgitating small saliva-cased building materials. He then gives them to the female who stays inside the nest leaving a slit for a window big enough to receive food and materials. For the next 6-8 weeks the male feeds the female through this opening. She does not emerge until she has molted and re-grown fresh feathers and her young has grown and become feathered, as well. Then, both mother and child knock down the wall and appear on the scene, happy and healthy. Last year the public was enthralled, as our hornbills participated in this ritual.

The zoo is concerned with the status of hornbills in the wild, and since 2004, the Oakland Zoo Conservation Fund has worked with a fantastic program coordinated by the Hornbill Research Foundation. Besides collecting data, the foundation has launched a Hornbill Nest Adoption Program, which works to foster conservation of these beautiful birds. Illegal logging and the poaching of young birds for the pet trade are the key issues facing hornbills. The Nest Adoption Program employs local people to look after the hornbills in their nests and collect scientific data about them.

When you adopt a nest, you get a wonderful pamphlet of information about the hornbill, a map of the location of your particular nest, a profile of your guard and, my favorite, a break down of what food the male brought to the female (2 figs, .3 millipedes, 1 lizard).

This summer, eighteen Oakland Zoo teens and staff will embark on a journey to visit Thailand and will spend a day at Khao Yai National Park with the intention hope to spot birds, nests and learn first hand about the project.  They will also visit with the Young Bird Conservation Club, which creates Hornbill art to sell to zoos for their Conservation Projects. To prepare for their trip, these inspired have been attending workshops and raising funds to adopt two nests of their own.

Back at the zoo, the summer will be filled with more hornbill conservation action as ZooCamp 2009 has adopted the species as their official summer animal. With a hornbill on the front of their t-shirt and the Hornbill Research Foundation logo on the back, all campers will be learning about this animal and the project that supports them. Each camper has also contributed a bit of their camp fee into the program and will surely leave camp with the contribution of knowledge and compassion for these incredible birds.

Come by and visit our hornbills, join us this summer at ZooCamp ,or adopt a nest yourself (http://www.zoo.org/conservation/hornbill.html).

Who's more energy efficient with the dishes– you or your dishwasher? Image: Ronan_tlvA microwave oven is the most efficient way to heat water for a cup of tea, hot chocolate, or coffee. True or False?

Now as a regular morning coffee drinker who uses a kettle and a gas stove to heat water for coffee (not instant– yuk! I use a coffee filter cone and PEET's coffee, of course) instead of the microwave, since our microwave is an old piece of inefficient junk that takes forever to heat water, I thought that buying a new microwave would make me a more energy efficient coffee drinker. But I was wrong!

Jennifer Mitchell-Jackson, while a graduate student at Lawrence Berkeley National Laboratory, measured the energy use of an average microwave oven, an electric stovetop, and a gas stovetop to heat up a mug of water. Turns out that an electric stove uses 25% less electricity than an average microwave oven to heat a mug of water. A gas stove is less efficient and uses more energy than a microwave oven, but depending on the cost of gas, it might cost less to heat a mug of coffee with gas compared to the microwave.

It is more efficient to wash dishes by hand than it is to use a dishwasher. True or false?

How many arguments has that one caused! The research to dispel this myth came from Germany. Rainer Stamminger, a professor of household and appliance technology and his colleagues at the University of Bonn, gathered more than 100 volunteer dishwashers with varying skill levels and dishwashing styles in a laboratory, and measured the amount of water and energy each used to wash big stacks of dirty dishes. He then washed similar dirty dishes in dishwashers and measured the dishwashers’ water and energy use.

His conclusion: The machine is more efficient than the hand. In general, the dishwashers used much more water and somewhat more energy than the dishwashing machines. Some test subjects used 53 gallons of water to clean 12 place settings! But there is a wide variation in the styles and economics of hand dishwashing.

Clearly, a new, efficient dishwasher is best. But if you can’t afford one, or like to spend a lot of time with your hands in soapy water, Stamminger and company have some suggestions:

• Remove large dish scraps with a fork or spoon.
• Do the dishes soon after a meal before the food has dried on the plates (get your dinner guests involved).
• Do not pre-rinse your dishes under running tap water (same goes for dishwasher use).
• Use a hot-water sink for washing and a cold-water sink for rinsing.
• Use just the amount of detergent recommended by the manufacturer.

And put that coffee mug in the dishwasher when you're done.

So where exactly does the water go when you flush your toilet? The short answer, if you live around here, is the San Francisco Bay. But what about the steps in between — where are those plants that clean and disinfect that water first? And which of the treatment plants have had problems with unintentional spills of untreated water into the Bay? To answer those questions, we created the first-ever online map of Bay Area publicly-owned sewage treatment plants and spills.

Our timing couldn't have been better; just this month, the State Water Resource Control Board released its own set of interactive spills maps. These maps, which are updated every 24 hours, show the locations and details of any wastewater spills that come from the sewer lines that lead to the plants. The State's map does not include any spills from wastewater (sewage) treatment plants themselves, however — luckily that's exactly what we've been working on!





(View this map– Wastewater Woes: Treatments & Spills– in a larger size)




The information was not very easy to come by. While spills from treatment plants sometimes get a lot of press, often they slip by mostly unnoticed. And there's no central database that collects all the information about these spills in one place. We combed through news reports, records provided by the State and Regional Water Resources Control Board, and the state Office of Emergency Services incident reports to piece together information about recent spills.

While our map won't get updated every 24 hours, the staff at the watchdog group Baykeeper intend to keep it current with new info. So go ahead, poke around. Find the plant nearest you, see where spills have been happening. And next time you watch water run down the drain, you'll know exactly where it's going.