1. Focus on Global Warming

2. How have humans contributed to the rising
concentration of greenhouse gases?
Carbon dioxide
Methane
Nitrogen oxide
Our factories, power plants, and cars burn coal and gasoline and ________a seemingly endless stream of carbon dioxide.
spit out
produce
We __________millions of pounds of methane by allowing our trash to decompose in landfills and by breeding large herds of methane-belching cattle.
The nitrogen-based fertilizers we use _______unnatural amounts of nitrogen oxide into the atmosphere.
release

4. Greenhouse Gases
碳氟化合物
氧化亚氮

5. How would the change in climate affect people’s life?
slight increase in heat and rain
moderate rise in sea level
more intense rain and hurricanes
hotter summers and warmer temperatures across the globe
an increase in vector diseases such as malaria
threat to the coastlines of low-lying islands
severe flooding and more deaths
more cases of heart stroke and deaths; more hospital admissions for those with respiratory problems

6. What are the actions we should take to slow global warming?
immediate actions
some strategies
long-term policies
to cut our consumption of fossil fuels;
to use technologies to reduce the emission of greenhouse gases;
to protect our forests
to reduce our vulnerability to global warming.
to encourage people to use environmentally clean fuels and technologies;
to stop the clear-cutting of forests