[填空题]Global warming is mainly caused by the release of pollutants into the atmosphere.

[填空题]Global warming is mainly caused by the release of pollutants into the atmosphere.

[单项选择]The vapor problem was mainly caused by the chemical containments from the groundwater out of the company.
A. True
B. False

[填空题]Wildfires are mainly caused by people, not by nature.

[填空题](S4) What did the author think mainly caused the traffic accident in this passage

[填空题]Car theft is mainly caused by ______.

[填空题]The sea level rise is mainly caused by______ triggered by unchecked greenhouse gas emissions.

[填空题]could contribute to global warming

[单项选择] Global Warming and Technological changes Recent studies have identified four major global environmental risks: acid rain, ozone depletion, deforestation and the greenhouse effect. On the whole, thanks to technological changes, people now tend to move toward warmer regions in North America and Europe. Climate warming will probably be a boon to Alaska, which is America’’s least productive state in Gross National Product(GNP)per square mile. Studies of the impact of global warming on the United States and other developed regions find that the most vulnerable areas are those dependent on unmanaged ecosystems—on naturally occurring rainfall, run-off and temperatures, and the extremes of these variables. Agriculture, forestry and coastal activities fall into this category. Most economic activity in industrialized countries, however, depends very little on the climate. Intensive-care units of hospitals, communications, heavy manufacturing and microelectronics
A. Right
B. Wrong
C. Not Mentioned