Word: layers
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Returning to fair Harvard in September can mean a lot of things: the chance to take new classes, see old friends, and enjoy Cambridge without a permanent layer of snow on the ground...
...look at the relationship from the U.S. perspective. For many years, there has been a layer of academics, policymakers and others politicians in the U.S. who have devoted their professional lives to the relationship with Japan. Countless Americans drive a Japanese car or use Japanese consumer electronics. At the same time, anyone who remembers the depth of anti-Japanese feeling over trade issues in the 1980s will need no reminding that familiarity with Japanese goods does not translate into popular political support for Japanese interests...
...Cash for Clunkers" [Aug. 17]: it is great to see new cars selling, the economy boosted and gas guzzlers reined in. But I am dismayed by pictures of late-model, low-mileage vehicles being destroyed. There should be an additional layer of the CARS program that would allow the millions of people who could never buy a new car to trade up their really old clunkers for more-efficient used cars. Lydia Ross Hartt, HOT SPRINGS...
...even with that battle all but won, scientists are finding a new man-made threat to the ozone layer: nitrous oxide (N2O), otherwise known as laughing gas. A study published in the Aug. 28 Science found that N2O - a by-product of agricultural fertilizer and a number of other industrial processes - is now the biggest ozone-depleting gas in the air, and could present a real threat to the ozone layer in coming decades. And worse, unlike CFCs, N2O - which also adds to global warming - is not regulated by the Montreal Protocol, meaning there is no global effort...
...idea that N2O poses a threat to the ozone layer is not new, but the Science study is the first comprehensive look at the exact concentrations and consequences of the gas. The investigators found that although N2O is only one-sixtieth as dangerous to the ozone layer as CFCs on a gram-by-gram basis, the sheer amount of N2O - each year nearly 1 billion metric tons of CO2 equivalent are released globally - means that it now poses a more significant threat to the atmosphere. (N2O emissions are calculated in terms of their impact on global warming...