Farmers are emptying some of the world's most important aquifers faster than rainfall can replenish them, which means less water for everyone. This map from the journal Nature shows where irrigation is doing the most damage.
Glass buildings kill millions of birds each year when the animals crash into windows. By studying how birds interact with buildings, architects and ornithologists are trying to create special features designed to keep birds alive.
Modern architecture loves glass. But glass also kills tens of millions of birds every year when they collide with windows. Now, researchers are trying to learn what birds can see, in an attempt to build better, more bird-friendly buildings.
India's massive power outage last week points to a major problem for developing nations: supply is struggling to keep up with the growing demand — an imbalance that can affect the reliability of electric grids. Grid catastrophes are rare, but blackouts can be an everyday feature of life.
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