That leaves scientists still asking the question — how much is global warming limiting oxygen availability worldwide? (scientificamerican.com)
This has led some climate scientists to declare that staying below the 2 °C warming limit, and hence avoiding dangerous climate change, is impossible. (newscientist.com)
Governments worldwide have in principle accepted that greenhouse gas emissions should be reduced and average global warming limited to a rise of 2 °C. (climatechangenews.com)