When a reader wonders whether he has to switch out all the CFL bulbs in his kitchen at once, Umbra sockets it to him.
Umbra swirls around the topic of bathrooms, drought, and those seemingly unavoidable gratuitous flushes.
Umbra sheds a little light on solar chargers.
A reader wonder about natural lubes. Umbra glides through the options.
Choosing hand sanitizers over the old scrub-and-rinse may conserve water, but it might not banish germs, either. Umbra digs up the dirt.
Cloth fiber from trees! Sounds like a good deal for the planet -- and it can be, says Umbra. But there's a few "gotchas" to consider.
We’re talking about water molecules, of course. Umbra gets into hot water.
If you're living off the water-system grid, do you still need to worry about conservation? Umbra dowses for answers.
Sure, sending trash far away burns more carbon than recycling it locally. But recycling it far away still beats trashing it. Umbra sorts the tradeoffs.