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Past Umbra

  • Umbra on mulch

    Dear Umbra, Spring is upon us and the season for spreading shredded bits of trees around our landscaping is here. How does Umbra feel about the utility of mulching, and what is the environmental impact of mulch production? OmarEllicott City, Md. Dearest Omar, Umbra feels excited about spring, I’ll tell you that much. Umbra is […]

  • Umbra on whether to eco-retrofit an old car

    My husband is an environmentalist. He wants one of the new alternative-fuel cars, but I have a dream to surprise him for his birthday with a 1970 muscle car (a Malibu or something like that) from his youth, which I would retrofit with a biodiesel or natural-gas engine. My questions are: 1. Should I put […]

  • Umbra on the climate-change literacy of Umbra readers

    Dearest Readers, Happy Earth Day. I have mixed feelings as I look forward to the planet’s special holiday tomorrow. Happiness on the occasion of anniversaries: Grist (six years), me at Grist (three years), Earth Day (35 years). Sadness, for this column shall be my last edited by my august editor, and we are having an […]

  • Umbra on nuclear energy

    Dear Umbra, What are your thoughts on the reconsidering of nuclear power as a viable solution for helping with energy shortages and improving environmental conditions? I was shocked to hear a “scientist” say (in a “no duh,” matter-of-fact type of way) that nuclear power is far cheaper and cleaner than our current coal- and oil-based […]

  • Umbra on getting up to speed on enviro issues

    Dear Umbra, I am new to the environmental movement, and I was wondering how you keep track of the major issues within it, because there are so many! Also, do you have any books to recommend on the history of the environmental movement? NaomiVictoria, British Columbia, Canada Dearest Naomi, Grist, of course! In addition to […]