Nepal, Sept. 24 -- China's emissions-cutting pledge is poised to take center stage at a United Nations climate meeting Wednesday, after US President Donald Trump unleashed a blistering -- if predictable -- broadside against the science surrounding planet-warming fossil fuels.

Some 118 nations will outline plans to curb global warming, which is driving disasters worldwide -- from catastrophic floods in Pakistan to raging wildfires in Spain -- even as many continue expanding oil and gas operations.

Chinese Premier Li Qiang will open the gathering at UN headquarters in New York.

His country -- responsible for about 30 percent of global greenhouse gas emissions from its factories, power plants, vehicles and more -- is expected to deliver a...