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.
But climate change is not an on-off switch. It is a continuing process. The sooner we stabilise atmospheric concentrations of greenhouse gases, the sooner we can reduce our impact on the climate and minimise the risk of reaching tipping points that will make preventing further warming even harder.