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Articles by Ask Umbra®

The New York Times calls Umbra Fisk "a trailblazer in the field of eco-advice columnists" and "the arch online sage of the new green age." Her latest passion: kale smoothies ... no, sorry, civic engagement, because getting political is the only way we'll get a planet that doesn't burn and a future that doesn't suck. Ask Umbra a question here.

All Articles

  • Umbra on bamboo origins

    Dear Umbra, Sustainably grown bamboo is a very good choice for fabrics. But how does the consumer know it is harvested sustainably? After all, some bamboo is clear cut from old-growth stands. Even in cultivated bamboo there are some very unsustainable practices (for instance, harvesting too young). How can you know if the bamboo fabric […]

  • Umbra on composting tainted food

    Dear Umbra, This tainted peanut butter recall is crazy. I have a box of crackers with peanut butter. Can I safely compost them in my hot compost pile? Jane Vallejo, Calif. Dearest Jane, Let me first say I am very sad for those who have been killed in this outbreak. My deepest sympathies to their […]

  • Umbra on gas engines and biodiesel

    Dear Umbra, I take it that a conventional engine cannot be converted to biodiesel? Jann T. Helotes, Texas Dearest Jann, The short answer is no — you cannot use biodiesel in a conventional, unmodified gasoline engine. However, I’ve learned my lesson about giving car advice in this space, so the longer answer is: Anything can […]

  • Umbra on heat and pipes

    Dear Umbra, In your video advice, you warn people not to set their heat below 55 degrees for fear of frozen pipes. My question is, “On what do you base the 55 degree number?” … I “core heat” with a stove in the fireplace. It heats the core of my house (kitchen and family room) […]