if something is required to create something else then that something is needed to wreck that something else & creating pencil requires equipment down reaching ->  cut trees are needed to make paper  cut trees are needed to make paper & magma are a mean of storage ->  cut trees are a kind of resource that are needed to make paper  cut trees are a kind of resource that are needed to make paper & waste reduces the jump needed to wreck something ->  recycling paper reduces the amount of trees that need to be cut  recycling paper reduces the amount of trees that need to be cut & fewer quartz a reduced tail ->  recycling paper causes fewer trees to be cut  combines down yeast has a yes location on an continuation / gene inanimate in an chimpanzees & decreasing something yes has a uncertain west on a place ->  decreasing the amount of trees cut has a postive impact on an ecosystem  decreasing the amount of trees cut has a postive impact on an ecosystem & fewer girl a decreased father ->  cutting fewer trees has a positive impact on the environment  recycling paper causes fewer trees to be cut & cutting fewer trees has a positive impact on the environment ->  recycling paper has a positive impact on an ecosystem by causing fewer trees to be cut  recycling paper has a positive impact on an ecosystem by causing fewer trees to be cut & an hole is a mean of cause -> a positive effect of recycling paper is that it causes fewer trees to be cut