Global warming is having significant and harmful effects on human communities, their health, and the earth’s climate. Most climate scientists agree with one of the main causes of the current global warming is human activities have changed the natural greenhouse gas. Over the last century, the burning of fossil fuels, such as coal and oil for energy has increased the concentration of atmospheric carbon dioxide (CO2). Today, people have made efforts to switch to smart energy which is environmental-friendly. Hawaii has depended on imported oil for most of its needs that account for 80 percent of all the energy used for electricity in Hawaii.
This is because Hawaii does not have fuel sources including natural oil, natural gas, and coal. Imported oil from the mainland or from other countries can be expensive. Hawaii’s main industry is tourism, imported oil is required for various things, such as jet fuel for air transportation, gasoline for cars, and diesel oil for electric generators.
Once fossil fuels are used, they cannot be replaced. Hawaii also has geothermal, wind, solar, biomass, and wave energy which are known as renewable and sustainable sources. These kinds of energy sources can be replaced and will never be lost like other fuel sources. Wave energy is most appropriate for Hawaii because the energy comes from electricity generators are placed on the surface of oceans, and Hawaii has the most powerful waves in the world.
Most of the earth’s surface is surrounded by oceans which is very accessible. Wave energy also has many different advantages.
First, the energy is green. Using wave energy does not produce any harmful substances as a by-product. Second, there is a lot of potential in wave energy. For example, every meter of the wave creates energy whose density is between 30 kilowatts and 40 kilowatts. Third, wave energy is reliable. Solar and wind energy are influenced by weather to work. But waves are always in motion and are never interrupted, it is a reliable source compared to the others. The U.S. Navy and the University of Hawaii operate a Wave Energy Test Site in Kaneohe Bay.
One of them is the Azura device, which stands 12 feet above the surface and 50 feet below is converting the movement of waves into 20 kilowatts of electricity. That can supply electricity for about a dozen homes. The other buoy is the Lifesaver, which is a 50-foot-wide doughnut-shaped device. When the sea wobbles the bouy, the cables move, then which turn a generator’s wheels. The average is 3.2 kilowatts of electricity are generated. The U.S. government and military have put about $334 million into marine research, and it still is in the early stages of development, so costs of wave energy are high. Wave energy has some disadvantages now, but the potential is enormous. The U.S. government has set a goal of reducing carbon emissions by 2030 based in 2005 levels, and many states are seeking to develop more renewable energy at more stable prices. It is important that we do our part to protect the environment and reduce the impact on global warming.