This past week thousands of delegates were in San Francisco for the Global Climate Action Summit. Spearheaded by California Governor Jerry Brown, the Summit showcases the commitments of states, cities and businesses to cut their greenhouse gas (GHG) emissions and protect the Earth from further dangerous warming. This is an urgently needed response to the U.S. vow to become the only country in the world to back out of its climate commitments under the 2015 Paris Agreement.