People have been living on the Earth for thousands of years. Human activity influences the Earth. Some people believe that the Earth is being harmed by human activity. Others feel that human activity makes the Earth a better place to live. In my opinion, the earth is being damaged by ; K( E* p& L2 v! X7 u% A& E& a# X7 v
human activity. There are many statements supporting my opinion.
+ Q! x- k) u$ B2 _/ Q4 w4 |( DHuman activity has damaged natural environment and almost exausted natural resources. Modern industry needs more and more resources, including minerals, fuels and water. So we confront of the serious problems such as the lack of fuels and water. Ecological balance is damaged because factories occupy many places where animals and plants live. More and more buildings are
2 }5 T! I% I( t+ [4 `8 u7 sconstructed and forests become less and less. If we cannot recognize these problems and solve them soon, we would finally lose the environment suitable for our living.
' @/ I' e i4 W- `* u! k& ]6 e5 `An other serious problem is "the green-house effect." Human activity decreases forests and : G8 B7 L* R6 P1 c
increases the usage of fuels so that the gas of carbon dioxide is output more and more and there
1 d- U, N$ D& q( ^* Y( o. Fare not enough plants to absorb it. The green-house effect is more obvious and more sensible ( P: L& j# u; J& U( z: ?& ^& j6 l
these years. Due to the effect, icebergs in the south polar and north polar melt and the sea level , P* ?& _2 s7 v
becomes higher than before. I am worried about the cities nearby the sea and hope scientists find , z6 Y. H+ y" ]+ v
an effective method to eliminate the green-house effect. % K/ W2 k, n9 d$ D: t! @, F
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Although we have advanced machines and our life seems more comfortable than before, we have less chances to approach natures and less spaces to act. The cities become bigger and if we want to have a picnic with our friends, we have to drive a long distance to find a natural place. In fact, the spaces of human activity are being damaged by the skyscrapers and factories.
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From the above statements, we can conclude that human activity brings the Earth many damages. Fortunately people have recognized the point and I believe that the Earth will become a better place to live with our ceaseless efforts. |
发表于 2012-8-14 23:46:10
