Danny Seo's Do Just One Thing

May 7: According to the Natural Resources Defense Council, one of the biggest culprits of water pollution is water runoff from homes. The source? Impervious surfaces like cement, which directs water onto roads and into rivers, along the way picking up toxic chemicals, dirt, trash and disease. Choose wood decking over concrete and interlocking bricks and paver stones for walkways. These allow water to drain naturally into the soil, grass and gravel areas. And if you can redirect downspouts away from driveways and onto grassy areas, that also helps prevent unnecessary water runoff.