warming, attention turns to meaningful ways to address the second most important gas in climate change. While CO2 accounts for 66 percent of global warming, methane emissions contribute 16 percent. Despite its smaller share of climate change emissions, methane has contributed about 30 percent of global warming since pre-industrial times, according to the US National Oceanic and Atmospheric Administration, and has been spreading faster than ever since records began. started in the 1980s. Although CO2 emissions have slowed during pandemic-related lockdowns in 2020, atmospheric methane has shot up and is now at its highest level in 800,000 years. Methane was present in the pre-industrial atmosphere at 800 parts per billion (ppb); today it is 1,800 ppb. (Mark Rowe, more at geographical.co.uk)