Euan Nisbet
Scientists can’t explain a “worrying” rise in methane levels
The amount of CO2 in the atmosphere reached a record high in 2016, according to the World Meteorological Organization (WMO). Thanks to a combination of human activities and the El Nino weather event, last year’s increase was 50% higher than the yearly average from the past decade, driving CO2 to a level that’s not been seen for 800,000 years.