Today, there are more and more people focus on environment problem. Cause there is one earth and we have not find a suitable planet to settle. If the earth is unavaible, we definitely would die out. Most of the environment problems from the comperhensive angle, are tough. Just by any person(induvidaul ) himself seems impossible to solve them. Then we should do nothing? It is wrong, we could change the world, we could make it better.
We are humanity, actually most of the environment issues are caused by human activities. Thus we must response for those issues. And we could do something. For instance, the air pollution. Some pollutant is discharged by the factories, some is made by cars. So if we change our means of transportation, using public ways such as buses and subways as much as possible. The pollutant discharged by our cars would apparently decrease. By the way, if we must drive to some places, using environmental friendly gasoline, likewise, would have positive effects on environment. If we do not do anything, we are killing ourselves. 
I must admit that one person's effect is limited on the environment. But consider that a day when we all do this thing. The human's power could not be slighted. Or how could we  pollute the environment. Think saving the resource, every body in the world save just one ton fresh water a day. We would save more than 6 billion ton fresh water a day. I cannot imagine that. That means, even the individual's effort is limited, the total power of the human is considerable. We must harness the powerful considerable force in a proper way.
Anyway, even the individual's effort have nothing to do with the environment. We could spread the concept of environment protection. We must be consider this issue as an significant one which could change human's fate. Therefore, let us act now, do everything we can to protect the earth which we rely on.