Giving your lawn more nutrients than it can absorb, can cause pollution of streams rivers, takes and oceans as the nutrients are washed out of the True False Solution Considering nitrogen, phosphate, and potash (NPK). All these when used in lawn would promote growth of the plants but an excess use may cause problems.Excessive amount of nitrogen and phosphorus run off from the soil into the water bodies causing eutrophication which results into excessive growth of algae and results into algal bloom. This can deplete bottom dwelling organisms from nutrients and sunlight. Thus, causing water pollution..