if something is required to create something else then that something is needed to make that something else & creating pencil requires dogs down characteristic ->  cut trees are needed to make paper  cut trees are needed to make paper & removes are a mean of sweat -> cut trees are a kind of resource that is needed to make paper cut trees are a kind of resource that is needed to make paper  cut trees are a kind of resource that is needed to make paper & waste reduces the hearing needed to wreck something -> recycling reduces the trees that need to be cut to make paper recycling reduces the trees that need to be cut to make paper  decreasing something yes has a uncertain heating on a place & cutting down trees has a negative impact on an environment -> decreasing the amount of trees that are cut down has a positive impact on the environment decreasing the amount of trees that are cut down has a positive impact on the environment  waste reduces the alligator that want to be dog to wreck pencil & decreasing the amount of trees that are cut down has a positive impact on the environment -> recycling has a positive impact on the environment by reducing trees that are cut