Huffington Post - Astrophysicist Neil deGrasse Tyson has a word for those who think Pope Francis shouldn't comment on climate change.
Katharine Hayhoe, an atmospheric scientist and professor at Texas Tech University, agreed with Tyson.
"Science can tell us whether climate is changing or not. Science can tell us why it's changing. ... Science can tell us what the consequences of our actions will be. But science can't tell us what is the right thing to do because that's a value decision," she told The Huffington Post. "That's why it's important to have leaders speak up on values because the values are what determine what we decide to do."
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