There’s no need to meet. Nature and capitalism have already conspired to accomplish this.
Since the treaty was signed and adopted, U.N. climate czars have determined that a greenhouse‐gas‐induced warming of 2.0 degrees Celsius (3.6 degrees Fahrenheit) is the threshold at which climate change becomes dangerous. They also ruled that we’ve already raised the temperature 0.6 degrees Celsius since the mid‐19th century.
That’s highly debatable, but let’s stipulate it. We can therefore accrue only 1.4 degrees Celsius more warming before we cross that threshold.
The U.N. estimates various amounts of total warming for what they call Representative Concentration Pathways of greenhouse gases, based upon what they used to call “storylines for economic development.” The highest pathway assumes that humanity will basically continue the same fuel mix of today through exponential economic growth. If the world were on that path, the U.N. says, total warming by 2100 would be about 4.5 degrees Celsius, far into their putative danger zone. A whopping 3.9 degrees Celsius of that will be in the remainder of this century, because of the 0.6 degrees Celsius we’ve already experienced.
(2100 is a nice but arbitrary endpoint. Energy‐wise, no one has a clue what the world will look like then, so it’s useless to speculate beyond.)