It was much more straightforward resource on Earth, they need to be used. To diminish every day, all the trees to make paper and furniture, House, oil must be used for several other cars.
When people have a number of resources on the earth, it needs to be taken to. Diminishing every day as a tree. To make paper, furniture and houses the oil must be used for many other vehicles.
When more people and resources on earth need apply. Derogate from every tree to do both houses, paper, furniture, the oil needed for the car of many other cars.