As UN's annual climate change summit kicks off, The Economist notes that the trajectory of greenhouse gas emissions is not encouraging, even in the case of the UN's stricter emissions pledges being enacted:

From the article:

Even the implementation of the most ambitious pledges, subject to strict rules, would take countries less than half way to where they need to be to keep global temperatures from rising more than 2 degrees (case B). And emissions would still be rising in 2020.