SOURCE: Science Alert

DATE: May 13, 2019

SNIP: Yet another alarming milestone of humanity’s damaging effect on the environment has now officially been reached – crossing a barrier into a hot, polluted future like the planet hasn’t witnessed in millions of years.

This weekend, sensors in Hawaii recorded Earth’s atmospheric concentration of carbon dioxide (CO2) passing 415 parts per million (ppm) for the first time since before the ancient dawn of humanity.

On Saturday, CO2 concentration recorded at the Mauna Loa Observatory in Hawaii by researchers from the Scripps Institution of Oceanography hit 415.26 ppm – the latest in a dire series of climatic thresholds being breached by a human society that refuses to relinquish the conveniences afforded by fossil fuels.

Obviously, crossing 400 ppm was a huge symbolic moment, numerically at least, but the symbolism doesn’t end there.

If carbon pollution keeps getting thicker in our atmosphere, more and more heat will become trapped on Earth, which will make the future of global warming look like something out of the planet’s distant, steamy past hundreds of millions of years ago.

The last time Earth scaled such dangerous heights (and heats), there were trees in the South Pole.