Original sentence: Proponents of recycling dispute each of these claims, and the validity of arguments from both sides has led to enduring controversy.Specifically, critics argue that the costs and energy used in collection and transportation detract from (and outweigh) the costs and energy saved in the production process; also that the jobs produced by the recycling industry can be a poor trade for the jobs lost in logging, mining, and other industries associated with virgin production; and that materials such as paper pulp can only be recycled a few times before material degradation prevents further recycling
Edited sentence: Proponents of recycling attempt to counter each of these claims, and the validity of arguments from both sides has led to enduring controversy.Specifically, critics argue that the costs and energy used in collection and transportation detract from (and often outweigh) the costs and energy saved in the production process (consuming 4 litres of gasoline to deliver 3 plastic milk containers to a recycling depot, a common Saturday activity, for example); also that the jobs produced by the recycling industry can be a poor trade for the jobs lost in logging, mining, and other industries associated with virgin production; and that materials such as paper pulp can only be recycled a few times before material degradation prevents further recycling