President Xi Jinping told a U.N. climate summit that China will reduce emissions across its economy, expand renewables sixfold and make electric cars “mainstream.”
Physicists have devised a new model to account for the discomfort that airline passengers know all too well.
On Wednesday in New York, countries lined up to say they would accelerate their efforts to cut greenhouse-gas emissions. In staying away, the U.S. was all but alone.
The final version of a document on fighting the rise of chronic illness around the world removed recommendations for taxes on tobacco, alcohol and sweetened drinks.