Jeb Bush says of climate change, "I don’t think the science is clear what percentage is man-made and what percentage is natural. It’s convoluted." Actually, it’s pretty easy to understand scientists’ best estimate of what fraction of recent warming is man-made — all of it.
The cradle of the American technology industry is home to lots of talk about how to #disrupt old ways of doing business. But Silicon Valley's approach to homelessness is painfully and expensively retrograde, a new report details.