People all over the world are getting worked up about the number 350.
Here’s the deal: Scientists are say that atmospheric carbon dioxide emissions must stay below 350 ppm. Or we’re screwed. Now, carbon dioxide concentratoins are around 390. So, climate activists are saying, something’s gotta change.
This weekend, people in Boulder will join communities around the world by rallying around a number: 350.
There are more than 4,000 events planned for Saturday across 170 countries — including 300 events in China, 500-plus in Central and South America, and 1,500 across the United States — to call attention to the number, which stands for a concentration of atmospheric carbon dioxide in parts per million.
Many scientists believe that the carbon dioxide concentration must stay below 350 ppm in order to keep the most traumatic consequences of global warming at bay. The carbon dioxide concentration hasn’t been that low since the late 1980s. Today, it’s at 387 ppm. Read more