Nonpoint Source Pollution
Science

A hypoxic areas in coastal waters, which fail to support the marine life living there
Dead zone
A hypoxic areas in coastal waters, which fail to support the marine life living there. Dead zone. A dead zone is an area in oceans or lakes with very low oxygen levels, making it hard for most marine life to survive.

When a water becomes overly enriched with nutrients which causes rapid growth of algae
Eutrophication
When a water becomes overly enriched with nutrients which causes rapid growth of algae. Eutrophication is when too many nutrients, like nitrogen and phosphorus, cause algae to grow out of control in water bodies.

Substances without carbon which are pollutants, such as heavy metals
Inorganic pollutants
Substances without carbon which are pollutants, such as heavy metals, inorganic pollutants. Inorganic pollutants are non-carbon-based substances, like metals and salts, that contaminate the environment and can be harmful to living organisms.