오존(Ozone) 살균기나 공기 청정기 등을 사용하다 가끔 비릿한 금속 냄새를 맡곤 해요. 바로 ‘오존’ 냄새지요. 이 냄새를 처음 맡은 건 네덜란드의 화학자였던 마르티누스 판 마룸이에요. 그는 1785년, 물 위에서 전기 반응을 일으키던 중 이상한 냄새를 맡았어요. 하지만 이 냄새가 전기 반응이 ...
the bottom of a mostly blue-painted globe of Earth, cruise ships peering at penguins, and that growing hole in the ozone layer over the south pole. But Antarctica is also the one place on Earth where many nations work together peacefully on scientific projects. They've even just solved the mystery of green icebergs. An iceberg is a chunk of continental ice, and the green ones are upside ...
eat vitamin D-added foods or take cod liver oil than to risk skin cancer, especially with the hole in the protective ozone layer growing.The latest word on skin cancer comes from Australia. It seems that dogs, cats, even cattle and pigs can also get skin cancer, especially if they are light-colored. Native Australian animals have skin pigment that protects against the sun, but the pets(from ...
mask the greenhouse effect. It can also accumulate destructive chemicals and thus help eat a bigger hole in the ozone layer.Chaos theory shows that in the complicated real world, large and unpredictable effects can come from small changes. We can't control volcanoes yet, But we can certainly do better at controlling the dust we help send into our air. We need better farm techniques to preserve ...
volcanoes, of which approximately 12 may be erupting at any moment.Aerospace activities increase the damage to the ozone layer. For one thing, all rockets produce exhaust dust. This happens not only when a spacecraft is sent up from Earth, but when the vehicle fires its rockets to maintain orbital position. The exhaust material descends into the stratosphere.Space launches create dust in the ...
to make biodegradable memorial candleholders that humans scatter around cemeteries. Refrigeration coolants destroy the ozone layer so the Sonic Compressor Systems company hopes to make refrigerators that work by resonating acoustic waves to compress gas. Non-dangerous coolants can then be used because there won't be conventional pistons and lubricants that they would damage. These ...
used in refrigeration devices, in aerosols-and which has now been recognized as a gas that is destroying Earth's ozone layer. Because Freon is very stable and undergoes no changes, it can be used as a marker. It can be added to the water of Lake Baikal and its presence here and there in the water will tell us how it circulates.Weiss discovered that 12.5 percent of the deep water in Lake ...
dangers of nuclear war, of chemical and radiation pollution, of overpopulation, of desertification, of the vanishing ozone layer, of the greenhouse effect are global. No nation can cope with these problems on its own.Efforts to solve these problems must also be global. No nation by itself can effectively deal with any one of them, if other nations do not cooperate. There are continuing ...
is a question as to how the microwave beams stretching from solar devices down to Earth's surface might affect the ozone layer, the atmosphere, people, wildlife and so on.The project had been advanced by Peter E. Glaser of Arthur D. Little Inc. in Cambridge, Mass., in the 1960s and NASA had considered the possibility in the 1970s. However, cost and environmental considerations seemed to kill ...
동아사이언스
디라이브러리
DS스토어
팝콘플래닛
