People always find something's importance when it has lost. Such as environment. For many years, we had developed our economy by sacrificing our environment. Now we taste the consequence to which we lead.
In the past, our development of economy was so fast, but we didn't think about how to deal with environmental pollution. If we get advances by sacrificing our environment, finally we will find this way is so uneconomy. For humany, there is nothing but environment is the most important. But it is pity that we need to spend much time learning it. Neither animals nor humany can leave our cradle which called Earth.
We don't know where we can go, but we must remember where we arise from. We should protect our home but destory it.