After we have calculated all of the nationally determined commitments (NDCs) in the Paris Agreement, we are still left with a gap of 10 to 35 gigatons of CO2, [the latter of] which is about the global emissions in 2017.
So again, we should not be surprised at the end of the year when the Intergovernmental Panel on Climate Change tells us later this year that we have a very, very little chance to achieve the Paris Agreement and its targets.
We are very unlikely to achieve a 1.5- or even 2-degree warming limit, and we are more likely end up in a 3-degree world.
Three degrees may be the “tipping point” where global warming could run out of control, leaving us powerless to intervene as planetary temperatures soar. America's most eminent climate scientist, James Hansen says warming has brought us to the "precipice of a great “tipping point”. If we go over the edge, it will be a transition to “a different planet”, an environment far outside the range that has been experienced by humanity. There will be no return within the lifetime of any generation that can be imagined, and the trip will exterminate a large fraction of species on the planet" ["Wild" magazine, April 2007].