Walruses
Walruses, like these in Alaska, are being forced ashore in record numbers. Corey Accardo/NOAA/AP

The worst predicted impacts of climate change are starting to happen — and much faster than climate scientists expected.  Historians may look to 2015 as the year when shit really started hitting the fan. Some snapshots: In just the past few months, record-setting heat waves in Pakistan and India each killed more than 1,000 people.

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