Laughing Gas: New Threat to the Ozone LayerDecades before, scientists discovered that CFCs were making a hole in the ozone layerover Antarctica (南极洲). This put humankind in (A) ___. In 1989, over 190 nationssigned the Montreal Protocol(《蒙特利尔议定书》) to phase out the use of CFC...
.Damage to Ozone layer Gets Worse In the middle of winter, when snow is falling in many parts of the United States, scientists have sounded a warning to people who plan to spend many hours in the sun this summer. The warning is: The sun’s summ
about the ozone layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter.The hole was caused by chemicals used in refrigerators and air conditioners.When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone. ...
(8分)Scientists from the University of East Anglia have identified four new man-made gases that are contributing to the damage to the ozone(臭氧) layer. Two of the gases are accumulating at a rate that is causing concern among researchers.Worries over the growing ozone hole have seen the ...
16.Scientists from the University of East Anglia have identified four new man-made gases that are contributing to the damage to the ozone(臭氧) layer.Two of the gases are accumulating at a rate that is causing concern among researchers. Worries over the growing ozone hole have seen the produc...
Recounts a news briefing at the National Aeronautics and Space Admininstration where two teams of researchers reported finding 'exceptionally high levels' of chlorine monoxide in mid-northern latitudes last month. The finding raised the possibility that the protective layer of ozone could diminish ...
This greatest male scientists list contains the most prominent and top males known for being scientists. There are thousand of males working as scientists in the world, but this list highlights only the most notable ones. Historic scientists have worked hard to become the best that they can be...
III.阅读理解 阅读下面短文.从每题所给的A.B.C和D项中选出最佳选项.并在答题卡上将该项涂黑.AAgainst the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees
concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter.The hole was caused in chemicals used in refrigerators and air conditioners.When these chemicals are sent out into the atmosphere, they produce gases that destroy the ozone.Conc...
阅读理解 Against the supposition that forest fires in Alaska Canada and Siberia warm the climate scientists have discovered that cooling may occur in areas where burnt trees allow more snow to