| A | B |
|---|
| biomass | plant matter or animal waste that can be used as a source of energy |
| smog | a mixture of smoke and fog |
| reservoir | a storage area for freshwater supplies |
| seamount | an underwater mountain |
| acid rain | precipitation mixed with wastes from burning fossil fuels |
| aquifer | an underground layer of rock or soil filled with water |
| basin | the ocean floor |
| water table | the top of water-filled spaces in the ground |
| current | a stream of water that flows through the ocean like a river |
| abyssal plain | vast, flat lands on the ocean floor |
| spring | a place where groundwater seeps out of the ground |
| groundwater | water that seeps into the ground into spaces between bits of rock and soil |
| fossil fuel | fuels formed from the decay of ancient forms of life |
