Three-quarters of the blue planet, as the earth is sometimes called, is covered with water. But only 2.5 percent of it is freshwater, suitable for human consumption. There's not enough to go around.
Few delegates at the Munich Security Conference showed up to discuss climate change. But those that did were reminded that the current collapse of the Earth's ecosystems is already causing conflict and mass migration.
Drought killed around a million trees in the German state of North Rhine-Westphalia last summer, putting pressure on Christmas tree farmers. But new techniques could help detect crop death early.
Berlin's politicians and clubs are teaming up to make partying more sustainable. Ideas range from more efficient light and cooling systems to generating energy through dancing. And there's an even bigger goal.
The death of a Spanish toddler who fell into an illegal borehole has put the country's water crisis in the spotlight. It's estimated that there are more than 1 million illegal wells in Spain.
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