The pros of desalination are increased clean drinking water and the preservation of freshwater supplies, which are limited. The cons of desalination are the high energy costs of the process, the relatively high capital cost of desalination plants, and the potential environmental damage of the brine created during desalination.Continue Reading
Desalination is the process of removing salt and other substances from salt or brackish water to create high-quality drinkable water . Although the surface of the Earth is more than 70 percent water-covered, more than 96 percent of this water is saline, or salt water. Reverse osmosis is a proven method to draw clean water, drinkable or usable for growing crops, from salt water.
Although desalination is considered expensive compared to groundwater or rain water, during periods of drought, the costs are considered more reasonable. As of 2014, the energy required for desalination is about 2 kilowatt hours per cubic meter of water, and desalination plants meet this energy need with fossil fuel. Desalination plants also produce pollution in the form of brine, concentrated waste that has up to twice as much salt content as sea water and may contain chemicals such as chlorine and the anti-scaling and anti-caking agents used in the process. Experts argue, however, that desalination plants may be less damaging on the environment than long pipelines or large-scale dams.Learn more about Sustainability
Nuclear power is a known energy source, it has low carbon dioxide emissions, and it is relatively low cost; however it still has an environmental impact, produces radioactive waste and has the potential for nuclear accidents. Another pro of using nuclear power is that it is considered a somewhat sustainable resource but the con being that the cost invested to build nuclear power plants could be focused towards wind, solar or geothermal energy sources.Full Answer >
Some of the benefits of using solar panels for energy generation include the fact that solar energy is a renewable resource, the abundance of solar energy that reaches the earth and reduced electric costs. Negatives of using solar panels include the expense of installing solar panels, the costs of storing solar energy and limited access to solar energy at night or during overcast periods.Full Answer >
Some pros of drinking water with fluoride in it are fewer cavities, less tooth decay and less tooth pain due to tooth decay, according to the Centers for Disease Control and Prevention. The only negative consequence of fluoridated water that scientific evidence supports is dental fluororis, a condition that causes changes in the appearance of the teeth.Full Answer >
The Endangered Species Act helps to revive dwindling populations of critically endangered species and promotes environmental preservation, but it may be time consuming and costly to implement. The Endangered Species Act is a legal tool used to identify and protect endangered species at the federal level in the United States. It helps to raise awareness of imperiled plant and animal species, but it can also put vulnerable species in jeopardy and takes quite a bit of time and finances to implement.Full Answer >