Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Green recovery:

"

Since the industrial revolution, the burning of coal, oil, and gas has released millions of tons of carbon dioxide, methane, and other greenhouse gases into the atmosphere, causing anthropogenic climate change. By 2020, the Earth's average temperature was 1 °C higher than pre-industrial levels.[citation needed] The UN Intergovernmental Panel on Climate Change (IPCC) calculated in its 2014 Synthesis Report that relative to the period of 1850–1900, the end of the 21st century (2081–2100) could see global mean surface temperature increase of 1.5-2.5 °C.[1] Burning a fraction of fossil fuel reserves will therefore lead to dangerous planetary heating, resulting in widespread crop failures, and the 6th mass extinction event.[2]