A climate breakthrough has rarely looked bleakerIt is politics, not logistics or physics, that is stopping us from tackling climate changeBy David Fickling / Bloomberg OpinionHas there ever been a grimmer backdrop to the world’s most concerted attempt to avert global warming? The main reason Kyoto failed to rein in global emissions was that it did not cover emerging nations, something remedied in the 2015 Paris Agreement. In 2017, forecasts indicated that without climate policies, global emissions would hit 65 billion tonnes of carbon dioxide by 2030. That figure is now expected to be 57 billion tonnes. Politics has always had a decisive impact on the trajectory of global emissions, and right now we are pointing 180 degrees in the wrong direction.