Yes, pollution is caused primarily by companies, national coal, the pentagon, ect. but small scale community clean up efforts are still good! cleaning your local park wont save the ozone but it will make life better for the neighborhood kids and wildlife! world problems arent a zero sum game. Small improvements are still improvements that make things better and I dont see how deriding them is positive in any context. You can agree there needs to be more large scale efforts without saying small scale efforts are useless and dont matter.
