| A | B |
|---|
| pollution | waste which is harmful to living things |
| oceanographer | a scientist who studies the oceans |
| photosynthesis | green plants use sunlight and water for energy |
| carbon dioxide | a gas breathed out by animals and used by plants |
| decompose | to rot or decay |
| thrived | grew strong and healthy |
| pesticides | chemicals used to kill weeds or insects |
| sludge | heavy, slimy waste |
| toxic | poisonous |
| liters | metric measure equal to slightly more than a quart |
| toxins | poisonous substances |
| dilute | thins out or weakens by adding water |
| algae | a type of plant that grows in water or damp places |
| bioassay | a test of biological activity |
