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Michael Bloomberg now serves as the United Nations Secretary-General's Special Envoy for Cities and Climate Change.
Governor Jerry Brown of California and former mayor of New York City Michael Bloomberg $4, an initiative aimed at keeping greenhouse gas emissions from US cities, states, and businesses consistent with the goals outlined in the Paris climate agreement.
The Obama administration set those benchmarks, along with $4, in order to keep the planet from warming by more than 1.5 degrees Celsius (2.7 degrees Fahrenheit) above preindustrial levels, a threshold that scientists say could keep the planet from launching into a tailspin of irreversible consequences. President Donald Trump had other plans, and $4 in June.
America's Pledge builds off movements like "$4," the $4 coalition of cities, and the $4 group of states, which all popped up after Trump made his announcement. The pledge plans to track the efforts of those initiatives, so all of the groups who have promised to keep American emissions $4 can ensure they do so.
"Today we're sending a clear message to the world that America's states, cities and businesses are moving forward with our country's commitments under the Paris agreement - with or without Washington," Brown said in the $4.
The pledge will "provide a roadmap for increased climate ambition" over time, and offer a game plan to help organizations drive down their emissions. The initiative will also compare projected emissions from its members to those of "business as usual" emissions under the Trump administration's policies.
"In the US, emission levels are determined far more by cities, states, and businesses than they are by our federal government - and each of these groups is taking action because it's in their own best interest," Bloomberg said in the release.
"The American government may have pulled out of the Paris agreement," he added, "but American society remains committed to it - and we will redouble our efforts to achieve its goals. We're already halfway there."