Checkmate is a position in Chess, in which a player's king is in a line of attack by an opponent's piece and cannot escape check.
The new study focused on 14 measures with the greatest climate benefit. All 14 would curb the release of either black carbon or methane, pollutants that exacerbate climate change and damage human or plant health either directly or by leading to ozone formation.
The report from the UN's intergovernmental panel on climate change concluded that climate change was already having effects in real time â melting sea ice and thawing permafrost in the Arctic, killing off coral reefs in the oceans, and leading to heat waves, heavy rains and mega-disasters. And the worst was yet to come.