A reader wonders when hydrogen-powered vehicles will rule the road. Umbra takes a look under the hood.
It is not in fact true that we're doomed to face a "catastrophic failure of the planet."
The idea that cutting food assistance will help move poor people towards self-sufficiency looks like a pipe dream.
ProPublica's interactive 50-state map is the best tour guide yet for this increasingly common hazard of North America's energy boom.
Leroy Mwasaru and his team tackled shoddy sanitation with a bioreactor that produces cooking fuel from so-called waste.
Food that’s not eaten still has a climate impact, after all, and beyond that, pie in the trash in an honest-to-God crime.
In the odd world of political media, whiny business interests are quoted extensively, while health benefits to the public are ignored.
A reader wonders where to look for the greenest threads. Umbra stitches together a plan.
Ben Simon is the cofounder of a nonprofit that redistributes leftover campus dining hall food to the hungry.
We've devised the world's shortest survey to find out what kind of actions our readers are taking. You know you want to.