Sentences with «atmospheric levels of carbon dioxide»
Since 2009, the planet has experienced its two warmest years on record, 2015 and 2014, while atmospheric levels of carbon dioxide have risen relentlessly, passing 400 parts per million. (washingtonpost.com)
The climate - change boundary means we must maintain atmospheric levels of carbon dioxide below 350 parts per million (ppm). (climate-resistance.org)
Thus it is scientifically proven that rising atmospheric levels of carbon dioxide cause global warming.» (principia-scientific.org)