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Past Umbra

  • Umbra on green hotels

    Dear Umbra, My husband and I are Americans who own a small budget hotel in Rome, Italy. We try to be as eco-friendly as possible: our cafe is local, organic, […]

  • Umbra on power strips

    Q. Hi Umbra, Around the table at lunch today, my colleagues and I were discussing ways to conserve and be more energy efficient. We’ve all heard that “dormant” appliances still […]

  • Umbra on solar holiday lights

    Dear Umbra, As the holiday season approaches, I’m trying to figure out how to spread good cheer in home decorations while being sensitive to the environment. Years ago, my husband […]

  • Umbra on planes and cars

    Hi Umbra, Which is less harmful to the environment when traveling long distances, flying or driving? A jet puts out a lot of exhaust, but since it carries a lot […]

  • Umbra on carbon offsets

    Dear Umbra, I’ve been reading the whole back-and-forth about carbon offsets, and it seems strange to me that most (all?) of the ones I’ve seen fund projects that, while worthwhile, […]