Since 1958, researchers have been measuring the amount of carbon dioxide in the atmosphere at the Mauna Loa Observatory. The remote outpost has just reported a carbon dioxide level of 400 parts per million — the highest it has climbed in the modern age.
The amount of carbon dioxide in the atmosphere has crossed the "psychological threshold" of 400 parts per million. That number is one of the clearest measures of how humans are changing the planet by burning fossil fuels.
Taking a page from the playbook of decades past, college students are once again pressuring schools to pull investment funding from specific sectors. This time it's big oil and coal companies. But these campaigns have effects beyond the university — they're launching a new generation of activists.
Climate change is already creating new winners among Europe's winemaking regions. (Great bubbly from Britain — who knew?) But those changes have also put in doubt the rules and traditions that have defined the continent's top winemakers for centuries.
You may not be thinking lofty topics like public health and environmentalism when you grill fish in your backyard, but Barton Seaver says the path to understanding such complex topics in human terms goes right through our stomachs ...
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