Climate Ask Umbra
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Umbra on water vapor and climate change
Dear Umbra, Coming from a scientific background, I was under the assumption that water vapor was the worst — or you could say the best — at causing global warming. Do you believe this to be false, and if not, why is no one talking about it? Erik Nash Dearest Erik, I’ve decided to use […]
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Umbra on the greenhouse effect
Dear Umbra, Man-made greenhouse gases are blamed for recent global-warming trends. But man-made greenhouse gases account for only 5 percent of the greenhouse effect. Water vapor, over which civilization has virtually no control, accounts for some 95 percent of that greenhouse effect. Why has so much attention been focused on man-made gases when they comprise […]
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A climate-change compendium
Dear Umbra, I know you don’t make up questions, but in this instance I think it’s acceptable. Could you suggest a collection of resources on climate change? I think it might help us all get better educated on this vital topic. Even if they don’t spend an hour of their Earth Day sifting through the […]
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Umbra on climate-induced relocation
Dear Umbra, Given that there is a possibility/probability that sea levels will rise significantly [due to climate change], and that some parts of the world may become too hot while others could become too cold, where in the world will things be relatively “safe”? If I start thinking about moving my family to another country, […]
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Umbra on climate-change patterns
While I am in no doubt about the effect of human activity on climate change, I have a friend who is convinced that even if we weren’t destroying the earth, the earth’s own weather patterns would be in global-warming stage anyway. How do we know the current climate change isn’t just an inevitable part of […]
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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 that the current warming trend is inside the scope of normal fluctuations? What is the evidence for (and against) arguing that the trend is caused […]
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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 issues. CO2 is consumed by plants, so here’s my thought: Could we grow crops that consume a lot of CO2 (I’m thinking bamboo here, which […]
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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 am very disappointed to find out that there are sanctioned “organic pesticides” which, with probably little to no independently researched information, may or may not […]
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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 depth, water depth, prevailing current, time of day, and ambient temperature all potentially affect the result? Have the criteria remained constant for the recorded history? […]
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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 and, whenever possible, the same with chicken. Am I wasting my money? Jeff PrittsSt. Louis, Mo. Dearest Jeff, Yes, basically. There is a chance that […]
