The answer is pollution.
Groundwater is water under the surface of the Earth which is widely used as a source of freshwater. Thanks to its position, it is not as much vulnerable to pollution such as surface water. However, some leaking of landfills, septic systems and agricultural chemicals that can reach it deep down under the surface can cause groundwater pollution.
Answer:
The simple answer is that the sun, like all stars, is able to create energy because it is essentially a massive fusion reaction. ... Technically known as nuclear fusion, this process releases an incredible amount of energy in the form of light and heat.
Explanation:
3. Producers are always plants and consumers are always animals. Producers also make there own food, and consumers hunt and eat theirs
In order for plants to assimilate nitrogen directly into their system, the nitrogen must be in the form of nitrates. Nitrogen in the air and ammonia from decayed matter in the soil is converted to ammonium by decomposers and nitrogen-fixing bacteria. The ammonium is further nitrified to nitrates by nitrifying bacteria. Finally, the nitrates can then absorbed by the plants.
