On 9th August, the Intergovernmental Panel for Climate Change (IPCC) published its Sixth Assessment Report. It contains the most up-to-date and thorough account of the current state of climate change and the science behind it. Some key points:
“It is unequivocal that human influence has warmed the atmosphere, ocean, and land.”
"Global surface temperature will continue to increase until at least the mid-century under all emissions scenarios considered."
“Many changes due to past and future greenhouse gas emissions are irreversible for centuries to millennia, especially changes in the ocean, ice sheets and global sea level.”
“Global warming of 1.5°C and 2°C will be exceeded during the 21st century unless deep reductions in carbon dioxide (CO2) and other greenhouse gas emissions occur in the coming decades.”
The full report and headline statements can be found here: IPCC - AR6 Climate Change 2021.