8 câu hỏi
Which of the following will be one of the consequences of a warmer earth?
Crops will be poor unless they are grown in the green house.
The amount of water will be decreased by half.
Farmer will get into trouble because of the heat.
There will be no winter on earth.
A rise in temperature will be more remarkable ____.
in the Arctic and Antarctic regions
in the coastal cities
by the year 2050
under the great ice sheets
The melting of the polar ice sheets will probably lead to ____.
a rise in global temperature
the extinction of many polar animals
flooding of many coastal cities
a serve winter all over the world
The Earth wouldn’t become warmer if ____.
the heat energy didn’t escape from the Earth’s atmosphere
sunlight didn’t pass through the atmosphere
the Earth didn’t send heat energy back into the atmosphere
carbon dioxide, ozone and water vapor didn’t retain the heat energy
When the rainforests are destroyed ____.
people have to burn coal, oil, gas instead of wood for fuel.
heat energy fails to escape from the atmosphere.
there is nothing to absorb carbon dioxide.
serious problems are caused for the scientists.
How useful is the ozone layer?
It protects the earth from the harmful radiation from the sun.
It absorbs much of the carbon dioxide.
It sends the extra heat energy back into space and thus keeps the earth cool.
It helps treat skin cancer.
The two factors that directly cause the greenhouse effects are ____.
the destruction of rain forests and the melting of the polar ice
the burning of fossil fuels and the changes of the climate
the increase of carbon dioxide in the atmosphere and the decrease of the ozone layer
the ignorance of greenhouse owners and the development of skin cancer
Which is the best title for the passage?
The global warming
The greenhouse effect
The heat energy
The change of climate in the poles