Maybe the block can go in on a chipper and share it. If you must use salt to melt snow, keep it away from plants. If you see plants that seem to be affected by salt, for instance along the roadway, soak them thoroughly to leach out salt. If you think your garden may have been contaminated by paint residue, from living next to a busy road or pesticides, be sure to have it tested before growing edibles in it. If plants are exposed to car emissions or other pollutants, give them a regular misting with a hose to help clean the leaves.
Noise pollution can be another problem.
Be sure the muffler on your gas-powered tools is working and try using a manual mower and trimmer whenever you can. Make the quietest running tools be part of your prerequisite when replacing or purchasing equipment from now on. Planting trees can be a beautiful solution to the pollution problem. Trees are natural air filters, absorbing chemical impurities that create air pollution and then releasing oxygen. They trap dust fumes and odor and help reduce the noise level surrounding your yard.