Ask Umbra
Grist’s destination for advice on life during climate change. Est. 2002
Past Umbra
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Umbra on global warming
Dear Umbra, The many articles on global warming conclude with something about the inherent complexity and uncertainty of the issue. So exactly what is the evidence for (and against) arguing […]
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Umbra on plants and global warming
Dear Umbra, My simple understanding of global warming is that we are introducing long-buried carbon dioxide into the atmosphere. This is shifting the balance, leading to a host of undesirable […]
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Umbra on organic pesticides
Dear Umbra, Recently, an article in my newspaper stated that federal and state guidelines allow the spraying of “organic pesticides” on organic crops. I thought organic crops were pesticide-free. I […]
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Umbra on measuring ocean temperatures
Dear Umbra, I’ve been hearing about rising ocean temperatures more and more. My question is, what are the criteria for measuring the temperature of the ocean? Wouldn’t probe location, probe […]
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Umbra on free-range chickens and eggs
Dear Umbra, I just read your column on organic syrup, and you made a comment about the futileness of the phrase “free range.” I always try to buy free-range eggs […]
