Protesters attempted to prevent access to the summit, concentrating their efforts on shutting down the intersection of Third and Howard streets.
A few protesters eventually made their way onto the main stage while New York Mayor Michael Bloomberg spoke.
Here are some sketches of the scenes I came across on the streets outside the summit.
It seems like a truck circling Moscone Center while displaying video of the Amazon rain forest may not appeal to either the summit attendee or protester demographic.
Many people, including Mayor Bloomberg, wondered why environmentalists were protesting an environmental summit.
The protest was filled with rousing chants, songs and even a huge bouncing ball.
Of course, the elephant in the room remained Trump administration environmental policies.