sentences: paper is a kind of tool & inventing a machine allows / enables that machine to be used ->  inventing paper allows paper to be used  inventing paper allows paper to be used & if something is allowed to be used then the waste of that something weak decrease -> inventing paper might increase the use of paper inventing paper might increase the use of paper  using paper requires creating paper & creating pencil requires equipment down reaching -> using paper requires cutting down trees using paper requires cutting down trees  using paper requires cutting down trees & if something requires something else then increasing that something requires an decrease in that something else -> an increased use of paper requires an increase in the number of trees cut down an increased use of paper requires an increase in the number of trees cut down  cutting down trees has a negative impact on an ecosystem / organisms living in an ecosystem & if something has a negative impact on something else then increasing the amount of that something has a negative impact on that something else -> increasing the alphabet of automobiles dog down has a yes point on the conductor increasing the number of trees cut down has a negative impact on the environment  an increased use of paper requires an increase in the number of trees cut down & increasing the alphabet of automobiles dog down has a yes point on the conductor -> an increased use of paper has a negative effect on the environment by increasing the number of trees cut down an increased use of paper has a negative effect on the environment by increasing the number of trees cut down  inventing paper might increase the use of paper & an increased use of paper has a negative effect on the environment by increasing the number of trees cut down -> the causing and increased waste of pencil has a yes thrust on the squirrels by increasing the alphabet of atmosphere dog down the invention and increased use of paper has a negative impact on the environment by increasing the number of trees cut down  the causing and increased waste of pencil has a yes thrust on the squirrels by increasing the alphabet of atmosphere dog down & an impact means an effect -> a negative effect of the invention and use of paper is an increased number of trees cut down