Lawrence M. Krauss in Critical Mass:
The newest Intergovernmental Panel on Climate Change’s (IPCC) Sixth Assessment Report released in late February paints a bleak picture of the global and local effects of climate change in coming decades, and of the challenges that governments and citizens face as they work to address the problems that will arise due to human induced global warming.
Have things changed dramatically since I published “The Physics of Climate Change” last year at this time? Not really. Just a clearer sense of current issues, and a clearer statement of what needs to be done and the challenge of doing it.
The key points are pretty clear.
(1) We are dumping about 10 billion tons of carbon into the atmosphere each year, about 50% of which will remain there for a millennium.
More here.