The Download: recycling's role, and tidying robots

But there are massive challenges ahead in material demand for climate technologies, and unfortunately, recycling alone won't be enough to address them. Our climate reporter Casey Crownhart has taken a look at why recycling isn't always the answer--and what else might help instead. This story is from The Spark, our weekly newsletter covering climate technology. Sign up to receive it in your inbox every Wednesday. The news: A new robotic system called OK-Robot could train robots to pick up and move objects in settings they haven't encountered before.