Most of the energy we use to power technology come from finite sources which are not sustainable. This energy which may be in the form of either fossil fuels, coal or even nuclear fuels and so on will eventually be used up. However renewable sources such as solar power will not run out…..until the sun runs out of hydrogen fuel but that’s another story.
We are able to harness the light energy radiated by the sun by the used of solar cells. A solar cell is an electronic device made of semiconductors which exhibit the photovoltaic effect to convert light energy into electrical energy. Semiconductors are materials which lie between conductors and insulators. A conductor is a material which is composed of atoms in which electrons are easily freed from the nuclei. Even though it is able to form a current, it remains electronically neutral as there are the same number of positive protons and negative free electrons. An insulator, on the other hand, is a material which is composed of atoms which hold more tightly onto their electrons so they have no free electrons like conductors. Current is a measure of the rate of flow of charge through a material, with the electrons being the charge carriers transporting energy across a circuit. Continue reading →
Profits, prices and power has become the priority for most of us, to the extent that we have depleted the natural resources made available to us with no regard for our future generations. Such is the case in “hydraulic fracturing” which has become polarised in recent years; however few people are aware of the process involved. Some have enforced that fracking is a revolutionary way to extract “cleaner” energy such as shale gas. Shale produces even more green house gas emission more than coal and other conventional fossil fuels during combustion. While others believe it is the solution for oil dependency and therefore lower oil prices. Put simply fracking is process to extract fossil fuels, similar to offshore oil rigs. What distinguishes fracking from other methods is the location. Most of us imagine the heavy industrial machinery to be to be planted in the most remote parts of the earth but fracking offers direct access to shale gas in the comfort of your back garden. And it is not only our lush gardens that are under threat, national parks and “protected” heritage sites are also in danger of ceasing to exist. With this ever-increasing threat to private property, can we continue to observe from the side-lines any longer? Fracking Countries strive to become independent oil producers whilst firms create a monopoly of fuel provider in hopes of lowering oil prices for consumers.I will explore the ways that the disadvantages of fracking heavily outweigh the advantages.