‘We’re at a tipping point with coal’: Q&A with Bloomberg’s Antha Williams Former New York mayor Michael Bloomberg was key in marshaling city and state governments across the U.S. to ramp up their climate action after the Trump administration pulled the country out of the Paris Agreement. With the climate-focused Biden administration now in office, Bloomberg Philanthropies is going “all-in toward climate solutions,” says Antha N. Williams, head of the foundation’s environment program. Among its main initiatives is the Beyond Coal campaign, which seeks to get OECD countries to transition away from coal by 2030 and the rest of the world by 2040.