Planet-warming carbon dioxide levels are the highest in human history
he amount of heat-trapping carbon dioxide in the atmosphere has shot past a key milestone—more than 50% higher than pre-industrial times—and is at levels not seen since millions of years ago when Earth was a hothouse ocean-inundated planet, federal scientists announced Friday.at Mauna Loa, Hawaii, averaged 421 parts per million of carbon dioxide for the month of May, which is when the crucial greenhouse gas hits its yearly high.
“The world is trying to reduce emissions, and you just don’t see it. In other words, if you’re measuring the atmosphere, you’re not seeing anything happening right now in terms of change,” said NOAA climate scientist Pieter Tans, who tracks global greenhouse gas emissions for the agency.
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