When will humanity ever hit the peak of its ever-growing carbon emissions?

We were duped. 
Or, at least, we were given some false hope. In the three years between 2014 and 2016, global carbon emissions from the burning of fossil fuels had finally stopped increasing and leveled out. Emissions weren't yet going down — but there was the potential that they had peaked. 
Perhaps, mused scientists, this was the fruitful beginning of humanity's collective response to alter the course of history, and in doing so, avoid the mounting woes wrought by climate chang