NEW YORK - US cities and states will work with experts to measure their progress toward meeting Paris climate agreement goals, representatives said on Wednesday, sidestepping US President Donald Trump's decision to pull the country out of the global pact.

The initiative - called "America's Pledge" - includes 227 cities and counties, nine states and more than 1,500 businesses, including Fortune 500 companies, and was announced in a statement by California Governor Jerry Brown and former New York City mayor Michael Bloomberg.

"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," said Brown in a statement.

America's Pledge comes a month after the White House announced it was leaving the 2015 Paris accord agreed by nearly 200 countries to curb climate-warming greenhouse gas emissions.

In a growing movement, cities, states and companies have since endorsed various statements promising to step up efforts to slow climate change.

"The American government may have pulled out of the Paris Agreement, but American society remains committed to it - and we will redouble our efforts to achieve its goals," said Bloomberg in a statement.

Outside experts with the World Resources Institute and the Rocky Mountain Institute, two US-based non-profits, have been retained to conduct the study on current and projected emissions of America's Pledge affiliates.

The initiative hopes to present their findings to the United Nations at a Bonn, Germany, climate meeting in November.

Under the Paris deal, former President Barack Obama's administration had vowed to cut greenhouse gas emissions by 26 percent to 28 percent below 2005 levels by 2025. But in abandoning the accord, Trump said the federal government would not honor those pledges, which were non-binding.

Still, last month in an effort to fill a climate leadership void, Bloomberg, a UN envoy on cities and climate change, committed $200 million to support city initiatives including projects to combat global warming through a grant program called the American Cities Initiative.

Bloomberg Philanthropies has also committed to separately fund America's Pledge.

Reuters