Turns out polar bears aren’t the only land mammals struggling with global warming. Many of the world’s most-used rivers, from the Colorado to the Ganges, have been losing water for the last 50 years. So, in addition to coping with floods, storms, deserts and mass extinction, we could all die of thirst. Happy Earth Day.

BBC:

From the Yellow river in northern China to the Ganges in India to the Colorado river in the United States — the US scientists say that the major sources of fresh water for much of the world’s population are in decline.

The researchers analysed water flows in more than 900 rivers over a 50-year period to 2004.

They found that there was an overall decline in the amount of water flowing into the world’s oceans.

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