Rotting organic materials such as grass clippings and leaf litter can be a mixed blessing for waters. Decaying plant materials provide food for many
aquatic organisms, but they also remove oxygen. You and your family
have a small pond on your land. What should you do with the lawn
waste from the surrounding land?

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.