The disease-resistant Callery pear once was American cities' street tree of choice. One community in Pennsylvania has banned it. This story originally aired on All Things Considered on April 24, 2015.
Tesla is building the biggest battery factory in the world. It hopes to drive battery prices down so far that lithium ion batteries are no longer just for laptops, phones or cars.
Fresno native Mark Arax has written about the war over water in his state for decades. "It used to be the farmers against the delta smelt fish, and now it's the urbanite against the almond," he says.
Pope Francis wants world leaders to work together to enact laws that will slow or stop emissions that fuel climate change. He is expected to deliver a papal encyclical in June highlighting environmental degradation and the effect of climate change on the poor. The Vatican held a one-day conference on climate change Tuesday.
New mandates in California will limit how much water graveyards can use to keep their grass green. The people who run cemeteries don't want crispy, parched grass to feel like an insult on top of loss.
An effort is underway to figure out how the BP oil spill harmed the Gulf of Mexico ecosystem. The damage may not be as dire as feared, but researchers say it's too soon to know the long-term impacts.
What's a fair way to divide up California's scarce water? The current system relies heavily on history: Some farmers will get water, others won't, based simply on when their land was first irrigated.