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 yearl...

https://www.engadget.com/2017/10/31/...ethane-levels/