Lesson1GlobalWarming

1、unit 22environmental protectionin groups discuss what you know about global warming. look at the pictures to get ideas.the greenhouse effect is the rise in temperature that the earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for exa

2、mple) trap energy from the sun. without these gases, heat would escape back into space and earths average temperature would be about 60f colder. because of how they warm our world, these gases are referred to as greenhouse gases.without this greenhouse heating, the earths average temperature would b

3、e only about -73 c (-100 f); even the oceans would be frozen under such conditions, such as the moon and the mars.what are greenhouse gases?some greenhouse gases occur naturally in the atmosphere, while others result from human activities. naturally occurring greenhouse gases include water vapor, ca

4、rbon dioxide, methane, nitrous oxide, and ozone. certain human activities, however, add to the levels of most of these naturally occurring gases .owing to the rise in atmospheric carbon dioxide caused by modern industrial societies widespread combustion of fossil fuels (coal, oil, and natural gas),

5、the greenhouse effect on earth may be intensified and long-term climatic changes may result. emissions of greenhouse gases before the industrial revolution, human activity released very few gases into the atmosphere, but now through population growth, fossil fuel burning, and deforestation, we are a

6、ffecting the mixture of gases in the atmosphere. refers to an average increase in the earths temperature, which in turn causes changes in climate. a warmer earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans. when scientist

7、s talk about the issue of climate change, their concern is about global warming caused by human activities. global warming(1)the rise in global temperature would also produce new patterns and extremes of drought and rainfall, seriously disrupting food production in certain regions (2) such global wa

8、rming would cause the polar ice collapse and mountain glaciers to melt rapidly and result in appreciably higher coastal waters. global warming cause the polar ice melt rapidlywhich countries do you think contribute more to global warming : developed countries like america, or undeveloped countries l

9、ike many in africa. why?developed countries -more industry and technology3 read the text and answer these questions. if necessary, give reasons for your answer.what human activities are causing global warming?what is global warming?global warming is an average increase in the earths atmosphere.indus

10、try , agriculture , transportation ,deforestation ,and burning of fuels are causing global warmingby 1 。f (one degree fahrenheit)yes ,they are ,because they trap heat in the atmosphere of the earth .other wise the earth would be cold and unsuitable for life.when faced with this question, as individu

11、als should recognize that collectively we can make a difference.what difference can we make?how can we help solve the problem of global warming?taking action on global warming (or climate change) is similar. in some cases, it only takes a little change in lifestyle and behavior to make some big chan

12、ges in greenhouse gas reductions. for other types of actions, the changes are more significant. when that action is multiplied by the 1.3 billion people in the china. or the 6 billion people worldwide, the savings are significant.taking public transport like buses can reduce greenhouse gas emissions

13、and taking train can also help a reduction of greenhouse gas. the recycling symbolbuy the recycled productsyour glass bottles could be recycled into house insulation, plastic bottles could be made into a cozy fleece jacket.paper recyclingyour paper could become part of a road or race-trackusing low-

14、flow shower headsbuying energy-efficient light bulbsuse the expressions in the box in the correct form to complete the sentences. beyond our control, pump into, as a result of, in large quantities, refer to, speed up1 water was the fish pond from the river.2 we all need to to finish in time!pumped intospeed up3 there is nothing more we can do .the situation