Ask Umbra
Grist’s destination for advice on life during climate change. Est. 2002
Past Umbra
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Umbra on personal fans
Dear Umbra, So the weather is turning hot again. I got my electric fans out of the closet. On the back of these, there are no indications of what amount of electricity they use. Could you illuminate which ones are most efficient? Howard Nelson Portland, Ore. Dearest Howard, Not really. Efficiency is very important for […]
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Umbra on ethanol
Dear Umbra, I’m a little amazed by all the bandwagon-jumping going on over E85 ethanol. I wonder if a corn-based fuel can be sustainable over the long term, given the general risks of farming and the disappearance of American farms in the last 20 years. And doesn’t anybody remember the great potato famine and the […]
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Umbra on canola oil
Dear Umbra, I recently saw “organic canola oil” on a salad dressing bottle. I looked up the origin of canola oil, and it looks like it is a genetic modification of rapeseed. I thought organic certification disallowed genetically modified foods. What’s the scoop? Tom Grundy Nevada City, Calif. Dearest Tom, Have you noticed yet that […]
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Umbra on herbicides and lawns
Dear Umbra, My husband just spread some very toxic weed-killer on our lawn, and I told him there must be a safer way to get rid of weeds. Our children and pets were not allowed on the lawn for 24 hours. We have a well and septic system, and I was wondering if that stuff […]
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Umbra on herbicides
Dear Umbra, How do herbicides (organic, if such exist, or non-organic) work? David Burch South Bend, Ind. Dearest David, Herbicides are considered a subcategory of pesticides, for all you confused by my last pesticide comments. Herbicides kill plants with a vast array of ingenious torture and maiming techniques. (Maiming a plant isn’t quite like maiming […]
