Winter's here, and you're probably cranking the heat. But hold your thermostatic enthusiasm: high temps in your home lead to high utility bills -- not to mention a high price paid by the earth. In today's episode, Umbra offers tips for staying warm without planetary or pecuniary peril.
"Ask Umbra" is the first video series produced by GristTV. Look for new video tips for greening your life from Umbra every other week.
