Climate Ask Umbra
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Umbra on lead pipes and drinking water
Dear Umbra, I live in New York City, which is reputed to have some of the best drinking water in the U.S. But I also happen to live in an old building that probably has lead pipes, so I buy Poland Spring water in five-gallon jugs each month. I’d prefer to drink tap water, but […]
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Umbra on UV ratings
Dear Umbra, Our radio station provides daily information regarding ultraviolet ratings. I am curious about what these ratings actually represent, and why they change so dramatically. For example, for the past few years, most ratings have been between three and seven. Now we are getting ratings of 10. I doubt the ratings are directly related […]
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Umbra on the eco-relevance of health concerns
Dear Umbra, As a practicing vegan for quite some time now, I take pride in my knowledge of nutrition and my ability to enrich my body through a varied diet with all the essentials. For the past five years or so, I have heavily relied on soy products for protein and other nutrients. Recently, however, […]
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Umbra on whether to leave the engine running
Dear Umbra, I have a question that has been nagging me for a while, and I would really like to have it answered once and for all. You see, I deliver pizzas for a living right now, and so I make many frequent stops and starts at people’s houses during a shift. I always turn […]
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Umbra on finding solar-power stats
Dear Umbra, Are there any statistics that show what percentage of solar power is generated state by state, and which states are more solar-friendly? Also, do power companies give out any figures on how much energy they buy back from home solar producers? Thanks from Los Angeles, Calif. Dearest Los Angeles, Life is great. As […]
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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 […]
