Cooling Earth with asteroid dust, and 3 billion missing birds

Science | AAAS | 9/19/2019 | Staff
kimberly163 (Posted by) Level 3
Click For Photo: https://www.sciencemag.org/sites/default/files/styles/article_main_large/public/images/birds1.jpg?itok=Mbyre8Ow

And I talk with Kenneth Rosenberg, an applied conservation scientist at Cornell University, about steep declines in bird abundance in the United States and Canada. His team estimates about 3 billion birds have gone missing since the 1970s.

This week’s episode was edited by Podigy.

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