How could every human improve ?

One thing that is obvious in this world is "if and only if somebody looses, somebody gains".So the Human society have developed so far, since the evolution of human race.Now almost every country is developing, in many fields. Even the developed countries like U.S.A, has several development plans.Development has attained a stage where people now are sure of being safe and sure of getting their food (except very few percent).So, these makes proud to be one among the Humans.But as I said earlier, one cannot gain unless one loose.On an average, human society is developing.So,who is the looser?Who is being deteriorated for the sake of Human development?Yes..Its the nature.Nature was depleted for the sake of human development.Right from timbre to petrol, everything is provided by Nature.We have come to a stage where the resources such as petrol and coal are present very much less in quantity.Even the soil has the tendency to loose its fertility soon. People destroy the forests to do agriculture then.So the stage where even if a person is wealthy enough to buy food, he cant get it. Hope that is not so early that within our generation we shouldn't be in that level. Hence, for the sake of human development, lets stop deteriorating the nature and try to preserve it.