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By Sophie YeoFeatures correspondent Earth Day emerged from the disquiet that many felt at the destruction of the natural world and has evolved into a global environmental movement. BBC Future talks to some of the original and more recent organisers to hear how it has changed.

By Michelle Roberts & Gareth EvansBBC News Millions of people in North America have been warned about the health risks of poor air quality, as toxic wildfire smoke from Canada drifts across the continent.

One morning in 2012, Phoenix real-estate developer Geoff Jacobs was playing golf when he got a surprising phone call. One of his employees, trying to bid on a house they wanted at auction, told him the price had reached their agreed-upon ceiling of $85,000 a rare occurrence, since they usually snagged the homes they

Ivan Perii, a professional footballer from Croatia born on February 2, 1989, competes for both the Croatian national team and Tottenham Hotspur in the Premier League. His primary position is on the wing, but he has also stepped in as a second striker, wing-back, and offensive midfielder.

ngel Hernndez, the most infamous umpire in Major League Baseball for the past decade or more, is retiring, effective immediately, according to a person familiar with the situation. The 62-year-old, who debuted in 1991, has not worked a game since May 9.