The data is in: carbon dioxide levels in the atmosphere hit 419 parts per million in May. The levels have now reached the dangerous milestone of being 50% higher than when the industrial age began – and the average rate of increase is faster than ever. The figure is the highest measurement of the crucial greenhouse gas in the 63 years that data has been recorded at the Mauna Loa Atmospheric Baseline Observatory in Hawaii – despite slowdowns in air travel and industry during a global pandemic in the past year. The 10-year average rate of increase also set a record, now up to 2.4 parts per million per year.
Guardian 8th June 2021 read more »