US states sue Trump over his move to scrap greenhouse gases ruling

Three dozen states and local governments have challenged the Trump administration's reversal of a landmark Obama-era scientific ruling which held that greenhouse gases were a threat to public health. The lawsuit seeks to overturn the administration's repeal last month of the 2009 "endangerment finding" that underpins US policies aimed at lowering emissions from cars, power plants and other sources of planet-warming emissions. Several environmental organisations filed a similar lawsuit last month. President Donald Trump touted the climate change rollback as a major achievement, calling it a victory over the Democratic Party's "radical" energy and climate policies. The petition filed in the US Court of Appeals argues that overturning the "endangerment finding" violated provisions in the Clean Air Act. The group challenging the administration includes 23 states and 17 cities, counties and state agencies, among them New York City, Los Angeles, San Francisco, Boston, Chicago and the Pennsylvania Department of Environmental Protection. Letitia James, New York State's attorney general, said the Trump administration's decision to throw out the ruling ignored the reality that "the climate c