It’s complicated. Rather than simple splitting events, the species histories of polar and brown bears, like those of humans, hide convoluted stories of divergence and interbreeding, study finds.
It could reduce industry’s reliance on expensive platinum, which has hindered the growth of fuel cell electric vehicles, green power generation and more.
The lessons and activities urge students to think about what plastic is, how they use plastic, and about the consequences of plastic pollution in the environment.
Research comes after China’s National Sword policy set strict contamination limits and restrictions on recyclable materials, throwing the U.S. recycling market into disarray.