Growing an ounce of cannabis indoors can produce as much carbon pollution as driving 370 miles! Researchers explain why it’s so energy-intensive — and what we need to know in order to cultivate it more sustainably.

We shouldn’t ignore the grief that stems from the loss of biodiversity and the impoverished lives of many people. But then we need to look to the future and set our sights on what we can still create, say coauthors Christiana Figueres and Tom Rivett-Carnac.