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advice

  • Umbra on Energy Star labels

    Dear Umbra, When I see the Energy Star rating on an appliance, can I trust that some government or consumer group is monitoring the ratings, or is that just a commercial ploy? Who profits from the Energy Star thing? Not Starry-EyedBridgewater, N.J. Dearest Not Starry-Eyed, A green screen. Photo: EnergyStar.gov. Energy Star is a project […]

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  • Umbra on hydroponic farming

    Dear Umbra, What are the advantages of hydroponics, and if it is so good, why isn’t it used more? LukeMitchellville, Iowa Dearest Luke, Plants take up most of their nutrients through their roots, despite all we learned in elementary school about leaves making food from the sun. Soil is a complex conglomeration of minerals, nutrients, […]

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  • Umbra on genetically modified foods

    Dear Umbra, Is most of the genetically modified food that makes its way into our grocery aisles really that harmful? It seems to me that the process of genetic modification is not that far from hybridizing and other tinkering processes that we’ve come to accept. Judi Boston, Mass. Dearest Judi, We don’t know, and that’s […]

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  • Umbra on the most effective personal eco-actions

    Dear Umbra, A lot of the questions people ask you ultimately involve pretty negligible results. When you are talking about the balance sheet of the world, does it really matter if I use a more or less environmentally responsible solution to wash my fruit? I’m wondering what three major concrete changes you’d recommend that people […]

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  • Umbra on plastic water bottles

    Several readers have sent in questions about the dangers of chemical leaching from plastic bottles. A composite version: Dear Umbra, I’ve read some conflicting things about the risks associated with reusing plastic water bottles. For instance, the generally trustworthy folks at the urban-legends site snopes.com have criticized a widely circulated email that claims regular water […]

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  • Umbra on whole-house fans and their righteousness

    Dear Umbra, We just moved to the steamy climate of Washington, D.C., from the other Washington. Faced with our first experience using air-conditioning to cool our home, we’ve got some questions about efficiency. The house we’re renting has a central AC unit that we can control with a thermostat. It also has a roof ventilation […]

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  • Umbra on opening windows versus running the AC

    Dear Umbra, My friend and I have been having a debate that I hope you can help us settle. What is the rule of thumb when turning off the air and opening the windows? I live in Texas and in the spring we have one or two days in a row that are cool enough […]

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  • Umbra on swamp coolers and their coolness

    Dear Umbra, I recently visited Moab, Utah, and found that many people there use “swamp coolers” rather than conventional air-conditioning systems. Moab is in a near-desert environment and has frequent water-shortage problems. I’m wondering whether this swamp-cooler method of air-conditioning is really greener than the systems most of the rest of us use, and whether […]

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  • Umbra on keeping cool without selling out

    Dear Umbra, Please advise me on the best way to beat the summer heat! I live in a rather steamy studio apartment and thus far have been languishing under fans in front of the open window, lapping up ice cream, and taking many cold showers. I feel a tad guilty about the excess use of […]

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