FILE - Former mayor of New York Michael Bloomberg speaks during the Earthshot Prize Innovation Summit in New York, Tuesday, Sept. 19, 2023. Bloomberg, the former New York City mayor, gave the most to charitable causes last year, according to the Chronicle of Philanthropys exclusive list of the 50 Americans who donated the largest sums to nonprofits last year. Bloomberg contributed $3 billion to support the arts, education, environment, public health, and programs aimed at improving city governments around the world, (Shannon Stapleton via AP, Pool, File) Michael Bloomberg, the former New York City mayor, gave the most to charitable...