sentences: if something is required to create something else then that something is needed to wreck 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 & waste reduces the hearing needed to wreck something ->  recycling reduces the trees that need to be cut to make paper  decreasing something yes has a uncertain heating on a place & state down pollen has a yes hunting on an argon ->  decreasing the amount of trees that are cut down has a positive impact on the environment  recycling reduces the trees that need to be cut to make paper & 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