Al Wadj Bank, Saudi Arabia. Credit: NASA.

Trump's assault on the environment begins with American headwaters.

The Waters of the United States rule was created after the Obama Administration shifted through more than a thousand scientific papers to identify which streams, creeks, and wetlands were relevant to environmental health.

The rule was lauded as a big step forward for ocean health. However, few expected it to cause so much controversy—poor public understanding led to widespread perception that the rule covered more than it did, and it became a lightning rod for conservatives.

Trump is empowering new EPA head Scott Pruitt to undercut the rule, leading to fears that the rivers leading to the sea will be vulnerable to pollution.

Mar 1, 2017

Ocean acidification, sometimes called "climate change's evil twin," begins with carbon pollution. That has driven ocean acidity up 30%, making it hard for coral, pterapods, and other ocean creatures to build their exoskeletons.

The bottom of the ocean food chain is basically dissolving, and we're doing nothing about it.

Climate change is driving fish away from oxygen-poor regions of the ocean. And the oxygen-poor regions are growing.

At the same time that oceans are taking in massive amounts of carbon dioxide, they're absorbing less oxygen than ever.

The top levels of the ocean are warmer than usual thanks to human-caused climate change. That is leading to an expansion of oxygen-poor hypoxic zones. Fish don't live in those. Large fish, in particular, are threatened by ocean oxygen loss, with the Pacific and Arctic experiencing the steepest declines.

Mar 1, 2017
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