However, the drawback to hydropower is that damming rivers can change the ecology of the region. For example, the water below the dam is often colder than what would normally flow down the river, so fish sometimes die. The water level of the river below the dam can be higher or lower than its natural state, which affects the plants that grow along the riverbanks. What you may throw out in your garbage today just might become fuel for someone else. That's right, whether you call it trash or garbage, this municipal solid waste has the potential to be a large energy source.
Garbage is also an inexpensive energy resource.
Unlike most other energy resources, someone will collect garbage, deliver it to the power plant, and pay to get rid of it. This helps cover the cost of turning the garbage into energy. Garbage is also a unique resource because we all contribute to it. Municipal solid waste can be burned in large power plants to generate electric power. There is also a way to use the energy trapped in landfill garbage.