As people stay home, Earth turns wilder and cleaner

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In this Saturday, April 11, 2020 file photo, a pack of jackals eats dog food that was left for them by a woman at Hayarkon Park in Tel Aviv, Israel. With a lockdown against the coronavirus crisis, the sprawling park is practically empty. This has cleared the way for packs of jackals to take over this urban oasis in the heart of the city as they search for food. (AP Photo/Oded Balilty)
SETH BORENSTEIN AP Science Writer An unplanned grand experiment is changing Earth. As people across the globe stay home to stop the spread of the new coronavirus, the air has cleaned up, albeit temporarily. Smog stopped choking New Delhi, one of the most polluted cities in the world, and India's getting views of sights not visible in decades. Nitrogen dioxide pollution in the northeastern United States is down 30%. Rome air pollution levels from mid-March to mid-April were down 49% from a year ago. Stars seem more visible at night. People are also noticing animals in places and at times they don't usually. Coyotes have meandered along downtown Chicago's Michigan Avenue and near San Francisco's Golden Gate Bridge. A puma roamed the streets of Santiago, Chile. Goats took over a town in
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