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  • Umbra on skiing

    Dear Umbra, With winter fast approaching, I was thinking of learning to ski. I was wondering how skiing ranks among recreational activities in terms of its environmental impact. What are all the effects of clearing ski trails, making snow, and operating ski lifts? Not to mention all the resorts and roads that sprout up to […]

  • Umbra on vegetarianism

    Dear Umbra, I have been a vegetarian for a pretty long time, but my uncle told me that if the human is not supposed to eat meat then why do we have teeth. He left me a little confused. Is the human being naturally vegetarian? LaidaSomerville, Mass. Dearest Laida, Your uncle is unkindly denigrating your […]

  • Umbra on cushion planters

    Dear Umbra, I have been cutting out old cushions, filling them with dirt, and planting them for some years now. I found the first two floating in the river (while canoeing). Since then, I’ve gotten them from the trash; I don’t pay anything for them. I use them to grow everything from herbs to prairie […]

  • Umbra on crows

    Dear Umbra, Is there a national increase in the crow population, or am I just noticing them more as I age? JimLa Jolla, Calif. Dearest Jim, Probably both. I’ll wager that you have become more observant as the years pass, but it’s also the case that, according to various bird counts and surveys, the American […]

  • Umbra on ground-level ozone

    Dear Umbra, Where I live, the air is declared “unhealthful” on many days in the summer due to ground-level ozone pollution. On those days, we have to stay inside until after about 3 p.m. My question is: What causes ground-level ozone to form and what are its reported health effects on adults and children? DeanBakersfield, […]

  • Umbra on killing your lawn

    Dear Umbra, I just moved into a house with a large backyard. I would like to xeriscape 90 percent of it, but I must first learn how to kill and remove the grass. I’m not a fan of chemicals and would like to find an alternate solution. Most of the yard is very, very brown […]

  • Umbra on forest fires

    Dear Umbra, My husband says that Rush is blaming the Sierra Club for the huge forest fires raging in Colorado and Arizona. He says that because environmentalists oppose logging, the forest is too full of fuel. I told him that as far as I know, the Sierra Club is really trying to prevent logging in […]

  • Umbra on flushing medications

    Dear Umbra, I work with a number of older women who try to be environmentally conscientious. When it comes to discarding outdated medications though, there seems to be conflicting advice. Medical doctors tell me that all such medicines should be flushed down the toilet. Water resource people say, don’t flush, because all those discarded medicines […]

  • Umbra on chlorinated swimming pools

    Umbra, I recently managed to mangle my knee and am going through all the 4,673 steps necessary to unmangle it and make it happy and functional again. One of the things my doctor advised me to do was swim. Well, swimming pools are of course full of chlorine! Hey, I just bought an expensive filter […]

  • Umbra on farmed fish

    I have a friend who is a homeopathic. She told me that I should stop eating pen-raised salmon because they are fed a lot of antibiotics. I was very disappointed because I thought I was eating a safe product. I don’t know how to get more info about this, but if you guys know anything […]