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.
There are many ways to juice your gadgets without throwing away mountains of dead batteries. Umbra charges through the options.
Disaster prep isn't a realm in which to get too obsessive about sustainability, but it makes all sorts of sense to stock your own kit, Umbra advises.
A reader wants to know how his college's customary balloon swarm affects the environment. Umbra offers a crash course.