Putting the United States back at the forefront on climate, Biden told a virtual Earth Day summit that the world’s largest economy will cut emissions blamed for climate change by 50 to 52% by 2030 compared with 2005 levels.

Biden’s early and aggressive environmental push marks a drastic shift from his predecessor Donald Trump — but quickly raised questions on whether the United States can keep promises if another climate-skeptic president is elected in the future.

John Kerry, the former secretary of state who has become Biden’s globe-trotting climate envoy, insisted that change will be permanent due to market forces no matter what happens in US elections.

With Thursday’s pledges, Kerry said more than half the world’s economy has committed to action to keep the planet’s temperature within 1.5 degrees Celsius above pre-industrial times, the aspiration set in the Paris Agreement to avoid the most severe effects of climate change.

Japanese Prime Minister Yoshihide Suga, who discussed climate last week when he was Biden’s first foreign guest, significantly raised the goals of the world’s second largest developed economy to cutting emissions by 46% in 2030 compared with 2013.

Canadian Prime Minister Justin Trudeau, another early ally of Biden, boosted ambitions of his energy-exporting country to reductions of 40-45% below 2005 levels, compared with an earlier target of 30%.

Guest post from EurActiv