The current rate of greenhouse gas pollution is so high that Earth has about 11 years to rein in emissions if countries want to avoid the worst damage from climate change in the future, a new study concludes. Despite dipping in 2020 because of the global pandemic, greenhouse gas emissions are on track to return to pre-pandemic levels, according to the annual Global Carbon Budget report. The findings, currently under review before publication, underscore that the urgency of cutting emissions is even greater than previously thought if the world is to avoid a rise in average global temperatures that is...