Ask Umbra
Grist’s destination for advice on life during climate change. Est. 2002
Past Umbra
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Umbra on installing solar panels
Dear Umbra, My husband and I have decided to install a solar electric system. We live in the high desert and enjoy sun 360 or more days a year. We have been surfing to find information and are increasingly befuddled. Nanosys will have new technology out, but I don’t know when. Should we wait a […]
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Umbra on organic syrup
Dear Umbra, I saw at the store there is “organic” maple syrup. Is there really a difference between organic and non-organic maple syrup? Do conventional farms spray the trees with massive amounts of pesticides? I don’t have much money (poor college student) so I was just trying to buy organic for things like apples and […]
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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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Answers about thermal depolymerization
Dear Umbra, What is thermal depolymerization? AnnFreehold, N.J. Dearest Ann, A polymer is a large group of linked molecules. We’re made of polymers such as protein, eat polymers such as starch, and wear polymers such as leather and nylon. Thermal depolymerization is a heat-driven process that breaks down or transforms polymers into the shorter chains […]
