Respuesta :

Explanation:

Taking steps to reduce or eliminate pollution from nonpoint sources such as streets and farms will help to maintain the ecological balance. Sewage and run-off of agricultural fertilizer can cause the rapid growth of algae in lakes and streams. The growth of algae blocks sunlight and depletes the oxygen in the water.

Answer:

You have the power to have a positive effect,

Explanation:

no matter how small, in maintaining the delicate balance of the Earth's ecosystem. Recycle to help prevent the over-harvesting of natural resources. Conserve energy by choosing more energy efficient appliances and automobiles.