Common Renewable Energy Resources

Fossil fuels like coal, gas and oil are a finite resource. With time, it will become harder to find and remove these resources out of the ground and this cost will be passed onto the consumers. This trend will continue if more resources continue to be used. And there are potentially more telling costs that come with using fossil fuels. Many people feel that they have caused many of the environmental problems that we are beginning to witness today and ultimately will be paid for by future generations. So what are the alternatives to these traditional sources of energy. This article will cover a few of the alternative energy sources that are being touted as practical solutions both commercially and for the individual homeowner.

The first alternative energy source to be covered is solar energy. It has been around for quite a while now and most people have seen the odd solar panel on a neighbors roof. To this extent, mankind has always known about the Sun's energy and used it is one way or another since the first civilizations where established, however it is only fairly recently that it has advanced to the stage that we are at now.

At this point in time, the Sun's heat and light energy is utilized to make energy for consumption.

Heat energy provided by the sun is used for many things like heating water, heating a room or cooking food. As we can feel the heat provided to by the Sun, the inspiration for using it as a renewable energy resource was not a great leap. In fact, It was a focal point of many of these early civilizations existence and may explain why many saw the Sun as a diety.

Harnessing energy from sunlight is still a relatively new discovery by comparison. The innovation that makes this occur is the photovoltaic (PV) cell. The idea was first tested in the late 19th century however it wasn't produced and sold until the middle to late 20th century.

The principle behind this is that photons in sunlight give the individual atoms in the PV cell enough energy to displace a spare electron. Many cells and more sunlight cause more electrons to flow. This is how direct current (DC) electricity works. Direct current can be stored in a battery or used to power appliances that run on DC.

Another popular option in terms of renewable energy is the use of wind power. I think this is because it is fairly well understood by most people as a concept. It may also be because plenty of wind turbines are popping up all over the countryside.

A wind turbine is a modern day windmill, it uses the power of the wind to turn blades. The kinetic energy is utilized by the generator to create electricity. Countries such as Germany, Denmark and the United States are increasing the number of wind turbines every year. They give the opportunity to create cheap yet clean energy.

Wind turbines or mills are an option even in the suburban home and can be constructed quite cheaply. It is quite simple to build a windmill or turbine from scratch or a pre-built variety can be purchased. Before this is done, it is important to ascertain the amount of wind you get and have a clear unobstructed place for the turbine to go. You may also want to notify your neighbors that you are erecting a turbine as it could be an issue with some people.

Other familiar renewable energy systems exploit the kinetic energy in water to create usable energy, like electricity. This is hydro-power and a dam is an obvious example of this process in action. Geothermal energy can also be used to some extent. This is using the heat from the earths core to heat water which can be turned into steam that can turn a generator or be used as is.