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  • 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 […]

  • Umbra on talking about environmentalism without being preachy

    Dear Umbra, Since you’re the closest thing to Miss Manners that the environmental community has, I’d like to ask for your etiquette advice. I was recently on vacation with some friends and friends of friends and was disturbed by the lack of environmental awareness. For example: the 30-mile round-trips to get a takeout latte. Really. […]

  • Umbra on having kids, revisited

    Dear Umbra, What do you feel is the one issue of personal responsibility regarding the environment that people ignore the most? VaughnJackson, Tenn. Dearest Vaughn, Reproduction. But what can you do? As I said the other time I touched this topic with a 10-foot pole, we don’t make childbearing choices based on politics. If we […]

  • Umbra on converting your car to straight veggie oil

    Dear Umbra, A few years ago, I bought a Prius because it was (and still is, unfortunately) the best car that’s offered in our messed-up world. I’m now going to buy an old diesel Mercedes and convert it to run on used vegetable oil. I think this might be the best way to go. What […]

  • Umbra on hybrids vs. veggie-oil cars

    Dear Umbra, I currently drive a 2002 Toyota Prius that gets about 40 to 42 miles per gallon on the highway, which is where most of my driving takes place. However, I’ve recently become enamored with biodiesel vehicles, and specifically with straight vegetable oil (SVO) vehicles. I’m interested in investing in an SVO system fueled […]

  • Umbra on Green Tags

    Dear Umbra, My power company (Florida Power and Light) sent me a letter asking me to choose its Sunshine Energy program, which, for an additional $9.75 a month, helps support the building of a 150-kilowatt solar facility in Florida. Do you think I should do it? LindaCoral Springs, Fla. Dearest Linda, Yes. And I am […]