Amazing what foods you can find in your own– and your neighbor's– backyard. Photo credit: Iso Rabins of ForageSF

Considering that I work from home, don't fly very often, and walk or take mass transit most places, I bet Michael Pollan is especially right for me. Last June, QUEST had a radio piece on a low carbon diet with tips to lower your CO2 impact, but my inner scientist needs some data. That's when I found the Carbon Foodprint Calculator.

Here's what I ate yesterday:

• Cereal with Milk
• Small Salad
• Chicken Sandwich
• 3 Diet Cokes
• Beer
• Apple, Banana, and some strawberries

My wife usually nags me about my diet, but I think I did pretty well yesterday! (excepting those diet cokes) My carbon foodprint was 2641 CO₂e points. Each point represents 1 gram of CO₂e equivalent or in my case 5.8 lbs of CO₂e. Now this is calculator certainly has limitations (mentioned in their FAQ section), but it is a satisfying comparison study. The site claims that most Americans have room to cut their carbon foodprint 25%. Not easily done, but luckily we have help in the Bay Area.

This weekend, Iso Rabins, founder of ForageSF, is taking an intrepid crew out to learn about foraged foods (virtually zero in carbon foodprint if foraged locally). He'll teach you how to identify wild edibles all around you, from wild fennel to mallow to nettle. Many of the plants we see everyday can be consumed on the spot (although better after a quick rinse). After taking a collecting walk, he'll cook up some snacks that includes some of what was foraged.

On Monday, Chef Laura Stec and climatologist Eugene Cordero cook up some Cool Cuisine, with a discussion of their new cookbook focusing on low carbon recipes. Cordero presents research on the energy efficiency of our food system and the relationship to our changing climate and then Chef Laura provides some practical cooking tips for low carbon foods without sacrificing flavor. For those who can't make the event, you can watch their presentation last month at the PARC Forum.

Guided Foraging Tour with ForageSF & TransportedSF

When: Sunday, August 9^th 12 PM – 7 PM

Where: Meet at Papa Toby's Revolution Café, 3248 22nd St, SF

Cost: $35, Tickets

Environmental Action through Eating: Best Bang for the Buck

When: Monday, August 10^th 6 PM – 730 PM

Where: Commonwealth Club, 595 Market St, 2^nd Floor, SF

Cost: $8 members, $15 non-members, Tickets

The students are given a small book of action coupons to take home that recommend tips such as powering down home electronics that use energy when officially "off" but are still in standby mode by unplugging the device or turning off the power at a power strip. Students can earn rewards in the form of prize cards featuring Wasteful Wendy, Rennie Reusable and other characters, for actions such as getting their families to eat one pound less of beef in a week, thereby saving 130,000 gallons of water (the water to grow the crops to feed the cattle, and so on.)

Monthly highlights focus on a particular action, and an Action Banner tracks the progress of the whole school, charting the amount of energy saved and the amount of greenhouse gases avoided. School teachers can go online to access materials, get advice from the staff of Cool the Earth, or just brag about how their school is doing.

The program is working because it employs an age-old motivational strategy– get to the parents through their kids. And the results are tangible. The program so far can account for more than 25 million pounds of carbon emissions avoided. There are 149 schools involved in the program so far, and there is a waiting list for participation. Almost 23,000 students are involved– translating into many more thousands of parents, brothers, and sisters.

A carbon-tracking cell phone. Credit: Nokia

Not exactly the environmentally-conscious line of thinking that organizers were hoping for, but understandable for those high-schoolers holding a brand new, latest version of the Nokia in their hands.

The way the San Francisco pilot program works is like this: students get a mobile phone equipped with a GPS maps application. They fill out a profile with the make and model of the cars they use. The cell phone monitors movement, so it picks up when that student is making a car trip. The server factors in the time of day, the weather and humidity, and the type of car the student is riding in – and then calculates the amount of carbon output that trip represents.

The program currently doesn't differentiate between cars and other forms of transportation – bikes, ferries, trains, carpools, buses – so students may need to note when those trips were not regular car trips. The final number is their carbon rating.

When the program expands to three other San Francisco schools at the end of March 2009, a competition will be formed between the high schools to see which group of 25 students can cut back the most on their car trips and carbon output.

That will help answer the question of how much pollution people can save just by altering transportation behavior. And hopefully, the participants here are young enough that those transportation choices might continue after the program has ended. Once they get used to walking or biking, for instance, maybe they'll make that a regular form of transportation.

That, of course, doesn't ameliorate the answer to the other burning question – that, yes, the cool phone goes away when the pilot program ends.

Listen to the Tracking Carbon through Your Cell Phone radio report online.

The Truckee River Canyon. Credit: Michael Conner.

Natural capital isn't something we hear about very often, and it certainly isn't a new idea. Aldo Leopold and other conservationists recognized the role that natural ecosystems play in our lives as early as the 1940's. But understanding and measuring that role hasn't been easy. That's where the Natural Capital Project comes in.

The project focuses on ecosystem services – the natural processes that ecosystems provide and humans benefit from. Those include how forests filter our drinking water, how wetlands provide protection from storm surges, and how bees and other pollinators support our agricultural industry. While these services may not be the first thing you think of when it comes to nature, researchers are discovering that they're vital to human health and decision makers are starting to factor that it.

A few examples:

In the 1990's, New York City's water quality dropped below EPA standards. The obvious option was to built a new water filtration plant – with a hefty price tag: $6-8 billion for construction and $300 million in yearly operating expenses. Instead, the city decided to invest in the natural processes that help keep water clean. That meant looking upstream to the Catskills watershed where intact ecosystems could help filter the water. The city bought land upstream and improved sewer treatment plants – all at a much lower price: $1-1.5 billion.

In China, the Yangtze River Basin experienced devastating floods in 1998. Many believed the vast deforestation of the surrounding area had been the major cause, since it had eliminated the natural buffer that existed. Since then, the Chinese Government has adopted a system of ecosystem payments – giving subsidies to farmers to plant trees and preserve forested areas.  All in all, their program in budgeted in the billions.

The Natural Capital project has created an online tool known as InVEST that's freely available to the public. It allows users to map ecosystem services in any landscape. The project's co-found Gretchen Daily is hopeful that the tool will make it much easier for natural capital to be part of land use decision-making – especially in countries where development pressures are strong. "It's stunning to see how rapidly things are changing globally. We're losing trillions of dollars of value in natural capital in the form of rain forests and other key natural assets" Daily said. The project is already working with the government of Colombia to use InVEST and to improve their resource permitting process. You can read more about where else they're working here.

Listen to the Putting a Price on Nature radio report online.

Multi-trunk Magnolia sucks carbon.
Photo: Jim Gunshinan

I feel good that those new trees are sucking carbon out of the air as we speak. But a recent talk at Berkeley Labs, where Home Energy's offices are located, made me think much bigger. Vinod Khosla is the founder of Khosla Ventures and earned his chops as the founding Chief Executive Officer of Sun Microsystems. Khosla Ventures exists to “assist great entrepreneurs determined to build companies with lasting significance."

Khosla, a tall, thin, 60-ish, short-grey-haired man who looks like he runs marathons, threw out some questions on a big screen to get us all interested. “What if more coal plants meant cleaner air? What if more driving meant less carbon? What if a million year crude oil production cycle were reduced to hours? What if engines were twice as efficient, cutting world oil consumption in half?" There are companies supported by Khosla Ventures that are making progress on those “what-ifs." For example, a company called Pax Streamline is working on turbine designs inspired by natural forms that will significantly increase the efficiency of wind turbines, power plants, and HVAC systems.

Living Homes is creating cheap, prefabricated, highly resource efficient and really swell looking homes. Khosla talked about making flue gases from coal-fired power plants into cement or fertilizer (that's how coal plants will someday clean the air).

The title of Khosla's talk was “Extrapolating the past or Inventing the Future." He thinks we need quantum leap changes in the way we design car engines, the fuel we use; how we manufacture cement, steel, and glass; and the way we build buildings. He spiced his talked with phrases such as “80% more efficient," “3- or 4-fold increase in storage capacity," and “100 miles per gallon diesel."

This radical way of thinking and imagining is more possible given 1) the Obama administration coming to Washington, 2) the cost in treasure and lives for our fossil fuel dependency, and 3) the crash in the financial sector and the stock market. The same old way of doings things (think incremental steps and short-term gain) isn't working anymore. Except for tree planting. That's always good, even if having a small effect on planetary atmosphere. And I like figs.

(Go here for a video of Khosla's talk. Then go plant a tree and invent the future.)

Since the CSA only buys whole animals, members get a few interesting things in each delivery. As Adler says, not every cut on an animal is a grill-able cut. Some cuts require other cooking techniques, and so members are challenged to do braises and stews with what they get. The idea is to create a new market for many of the local, small-scale producers. And Adler says she's been getting phone calls from many others looking to join.

Adler has decided the CSA will take the summer off, so she can work on restructuring it into a more cooperative model. As she says, one of the goals of the CSA is for consumers to connect with their producers and she's hoping the CSA's structure can reflect that. The good news is a number of other meat CSA's have arrived on the scene in the Bay Area for those of you looking to join one. Those are:

• The Clark Summit Meat Club
• Sonoma County Meat Buying Club
• Marin Sun Farms
• And here's a list of meat CSA's nationwide

As I also discovered in this story, eating a low-carbon diet is not simple. Researchers are just starting to get a handle on the methodology used to do a life cycle analysis for food. And the news isn't good for meat and cheese lovers – it turns out red meat and dairy products have the highest carbon footprints. The further you dive into their life cycle, the more complicated it gets. Luckily, Gail Feenstra of UC Davis's Sustainable Agriculture Research and Education Program has a few simple tips to cut your carbon.

• Eat less red meat and dairy
• Avoid foods grown in heated greenhouses by eating seasonal food
• Avoid food transported by air by eating locally
• Consolidate your shopping into as few trips as possible
• Waste less food. If it goes into a landfill, it emits the same gases as cows

You can get a sense of the footprint of your diet through the Bon Appetit Management Company's Eat Low Carbon Calculator or you can look up a local farmer's market with Local Harvest.

You may listen to "Eating a Low Carbon Diet" report online, as well as find additional links and resources.

The 2006 Word of the Year was "carbon netural" in the The New Oxford English Dictionary. But there's still a lot of debate about what it means. Many people compare the U.S. carbon offset market to the Wild West. Since there is no regulation, how do you know what you're buying?

There are several guides to carbon offsets that have been created by non-profit organizations, designed to help the average consumer (see related resources). But part of the problem is that many people are still debating what a carbon offset should be. And that's a debate that can be found in the blogosphere.

One place you can find it is on the Grist.org blog which has many bloggers writing about green issues. Forestry offset projects, which sell credits based on the fact that trees sequester– or hold carbon dioxide, have come under fire. You can read about a few of the critiques here, here and here.

Another blog, Treehugger.com, has followed the issue as well. They posted this comparison of offset providers to help their readers do their homework and this more in depth guide on the issues buyers should be aware of.

Of course, one of the earliest debates over offsets was whether offsets would act as "indulgences", distracting consumers from making concrete changes in their lifestyles to reduce their carbon footprint. Terrapass, one offset retailer, has tried to investigate this by surveying their customers. They found that the majority of them had already had green habits. Still, the virtues of offsets are a matter of personal opinion.

You may listen to the "Cashing in on Carbon" radio report online, as well as find additional links and resources.

Lauren Sommer is an Associate Media Producer for QUEST.

latitude: 37.325510, longitude: -120.640341