This the last paragraph of a composition:
In sum, protecting the environment should always be an important concern of all the countries. However, when it's possible to minimize the harm to environment in the exploitation of these valuable natural resources in the wilds, it is at best unwise and at worst heartless to leave all the treasures sleeping in the bleak wilderness while billions of people are suffering from extreme poverty and starving to death.
I'm not quite sure about "an important concern".
BTW: Do you think there's any other problem in this paragraph?