Background
- The United Nations (UN) Intergovernmental Panel on Climate Change (IPCC) recently released its sixth report (Sixth Assessment Report – AR6) in a series of reports that assess scientific, technical, and socio-economic information concerning climate change
- The report highlights that human influence has warmed the climate at a rate that is unprecedented in at least the last 2,000 years. Key findings include:
- In 2019, atmospheric CO2 concentrations were higher than at any time in at least 2 million years, and concentrations of methane and nitrous oxide were higher than at any time in the last 800,000 years
- Global surface temperature has increased faster since 1970 than in any other 50-year period over a least the last 2,000 years
- Global mean sea level has risen faster since 1900 than over any preceding century in at least the last 3,000 years
- Greenhouse gas emissions from human activities are responsible for approximately 1.1°C of warming between 1850 and 1900
- Averaged over the next 20 years, the global temperature is expected to rise by 1.5°C or more