Michael Bloomberg and Governor of California launch new United States climate action plan

Michael Bloomberg now serves as the United Nations Secretary-General's Special Envoy for Cities and Climate Change.   Mark Wilson  Getty Images

"America's Pledge", as the plan has been dubbed, comes a month after the White House announced it was leaving the 2015 Paris accord agreed by almost 200 countries to curb climate-warming greenhouse gas emissions.

The latest moves from USA states, cities and businesses came as Trump took a state visit to France to meet the country's recently elected President Emmanuel Macron this week.

The goal of the alliance is to bring states together to reduce emissions 26-28 percent from 2005 levels, in order to meet or exceed the targets of the federal Clean Power Plan, which Trump has promised to undo.

A major initiative to measure US efforts to cut carbon emissions was announced today in a joint statement by California Governor Jerry Brown and former New York City Mayor Michael Bloomberg.

Governor Brown declared: "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".

In November, Brown and Bloomberg, along with other US governors, mayors, and business leaders, will present the climate commitments of USA subnational and non-state actors at the COP23 climate conference in Bonn, Germany, and offer a set of best practices to help fellow signatories continue to cut greenhouse gas emissions.

Donald Trump was the only member of the G20 to not sign a pact to push back against climate change last weekend.

Nutall said that while the United Nations welcomes the initiative from USA cities, states, and businesses, the challenge will be quantifying the effect of climate action from diverse and potentially overlapping actors, a process that will likely stretch well beyond this year's climate conference. This set of options, which will highlight the significant levers available to states, cities, and businesses to further reduce USA emissions, will serve as a playbook for enhanced ambition among US climate leaders who are committed to meeting America's commitments under the Paris Agreement. "We're already halfway there".

The overwhelming majority of Americans, including those who voted for President Trump, support climate action, energy efficiency, and renewable energy.

From the Real News file comes a digital milestone for the United States Climate Alliance, a coalition of states committed to upholding the tenets of the Paris climate accord.

Adrienne Esposito, executive director of the Farmingdale-based Citizens Campaign for the Environment, said the president "made America into an worldwide laughing stock".

The America's Pledge coalition is working with the World Resources Institute and the Rocky Mountain Institute to quantify the impact of the sub-national pledges, though the exact mechanism for those measurements remains unclear. "We will talk about that in the coming period of time", Trump is quoted as saying, before reportedly shrugging his shoulders and adding: "if it happens that will be wonderful, if it doesn't that will be ok, too".