泛读小组展示

1、About the auth0rAbout the auth0rAlvin Silverstein grew up in Brooklyn, the youngest son of an immigrant family who emphasized hard work and education. After graduating from Brooklyn College, he went to graduate school at the University of Pennsylvania, where he got a Masters degree in chemistry and

2、met his wife, author Virginia Silverstein. He got his Ph.D. at NYU while teaching at the College of Staten Island. He ultimately became a Professor of Biology there and also Director of the Physician Assistant program, while coauthoring books with his wife and, later, two of their children as well.

3、In 1971 they realized their long-time dream of moving to a house in the country, in rural New Jersey.Alvin SilversteinAlvin SilversteinCREEPY CRAWLIESGlobal WarmingForces and MotionThis article told us something about global warming . Many scientists believe that our planet has been on a warming tre

4、nd over the last two hundred years and that our activities are responsible for this global warming . The global warming theory is supported winters getting milder , glaciers melting and sea levels rising and scientists use the greenhouse effect to describe this phenomenon. Finally it told us the gas

5、es include carbon dioxide ,water vapor , methane , nitrous oxide , chorofluorocarbons and ozone involved in the greenhouse effect . The warming trend The global warming started with the Industrial Revolution and scientists believed that the widespread burning of coal and other fuels could lead to it

6、 .Hoe the Greenhouse Effect Works Most greenhouses look like small houses with glass roofs and walls . Earths atmosphere ,like the greenhouse glass , allow the suns light energy to pass through and some of the energy absorbed by things on the planet to go back to the space .Water Vapor It is the mos

7、t important greenhouse gas . Warm air can hold more water vapor .So the temperature rises ,the contribution of it increases. The Carbon Dioxide Problem Scientists believe that this greenhouse gas accounts for about 55 percent of the global warming due to human activities . And deforestation add extr

8、a carbon dioxide to the atmosphere . Methane produced by human activities is the second most important greenhouse gas . And some of the methane in the atmosphere is formed naturally . The Methane Problem Asweknow,theglobalwarmingismoreandmoreevidentandwemustbuildagreenearth.Weshouldntfiresomuchchemicalfueltoproducegreenhousegases.Inthemeanwhile,thegovernmentshouldmakeregulationstoprotecttheenviroment,suchasplantingtreesinsteadofcuttingdownandreducetheemissiono