This week is a big one for our world

Atmospheric carbon dioxide (CO2) levels climbed above the 400 parts per million (ppm) and it’s distinctly possible they won’t be back below that level again in our lifetimes.

“As a human, though, passing both the 400 ppm and (potentially) the 1°C threshold within such a short time period makes it clear we are already living in a different world. We have blown past targets that were being considered as viable when I entered graduate school. We have significantly reduced the options available to us in the future. If we aren’t going to blow past the next set of thresholds — 500 ppm and 2°C — within just a few more decades, we have a lot of work to do in Paris in two weeks and beyond.” Katharine Hayhoe, atmospheric scientist at Texas Tech University.

Leave a Reply

You must be logged in to post a comment.