What Greg King says is true enough.
And I will address some of the major misunderstandings that are used to obfuscate the scale of the issue.
The annual turnover of carbon in the natural cycle is far greater than what humans add, but it is all cyclic, the same carbon going round and round, and what we are doing is adding to it by digging up carbon that has been buried for a long time and releasing it to the atmosphere.
And the heat balance of the planet is a very complex subject, with many different gasses contributing to it, most significantly water vapour, and many other factors also (like the reflectivity of ice vs rock, of grass vs trees, etc).
The thing about CO2 is that it works in part of the spectrum that nothing else really does, so its impact is small but significant. At present it adds up to about 2W per square meter (way less than 1%) but summed over the entire planet it is adding the equivalent energy of about 3 Hiroshima bombs going off every second. So it adds up over time.
As things get warmer, weather patterns change. Some areas will get too hot for people to live there, others will become too dry. The biggest issue is likely to be the increase in extremes. The average might not change much in many places, but the incidence of extreme weather events is likely to increase most places. If you are a farmer growing crops, or someone who wants to eat them, that can be a big deal.
The last few years of satellite data show significantly faster warming than anything predicted in the earlier IPCC models.
It is a real issue.
We need real solutions.
Planting trees is not a real solution.
We must get off using fossil carbon as a fuel source. The biggest problem there is the huge profits being made from oil, and all the influence that buys in political systems. Oil is a capitalists dream, relatively easily monopolised, with all the profit that comes from that.
Solar is the only real alternative, and it is a capitalist’s nightmare, widely distributed and essentially free once the capital cost is covered. No profit in that, so expect it to be resisted with every tool in the toolbox, including levels of deceit and deception not yet dreamed of.
So we find ourselves in an age where the interests of money are directly opposed to the interests of humanity generally.
Very few people are sufficiently self educated to be able to stand outside the systems of fake news and gated institutional narratives that we now find ourselves in.
It seems to me that the problem is not that difficult to solve technically, but all such solutions are anathema to the system of market based values that currently dominate the planet.
In order to solve the problem we need global cooperation, and we need to think outside of the box and money and markets, and actually start to use automated systems to deliver the reasonable needs of most people to everyone.
That involves a change in thinking that not many have yet seriously thought about.
We need a lot more people to start thinking seriously about it – soon.