Fossil fuels are the main sources of energy in many countries. But alternative source are being encouraged. Is this a positive or negative trend?

Essay topic: 

Fossil fuels are the main sources of energy in many countries. But alternative source are being encouraged. Is this a positive or negative trend?

Over the last two century an ever increasing proportion of our energy has come from fossil fuel like coal, gas and oil. While demand for energy rises, these resources are running out and scientists are exploring potential of alternative energy sources for the future. Though alternative energy sources have some drawbacks, but I think the advantages outweigh their disadvantages to a greater extent.

To begin with, scientists are still looking for the solution about how to reduce the cost related with alternative energy production. But apart from this all the other weaknesses of alternative energy is quite easy to ignore. In fact, unlike fossil fuels alternative sources ( like water, wind, solar) do not emit atmospheric pollutants like greenhouse gases. This gases are responsible for the global warming and climate change. Another point to note that, removing the fossil fuels can prove detrimental, even disastrous to the environment, ranging from strip mining operation to spilling of oil, which never happens with alternative energy production or excretion. A good illustration of reducing pollution by alternative source is new hybrid of battery powered vehicle in Japan which is not only lowering environmental pollution but also providing a safe journey to its passenger.

Scientists all over the world are having increasing concern about alternative energy because fossil fuels are inefficient, unsustainable and environmentally destructive. secondly,as fossil fuels deposits are unevenly distributed worldwide, frequently in less politically stable nations, world can suffer from flow interruption and price spikes. finally, unlike fossil fuel, which will become increasingly scarce, these alternative sources are renewable and never run out. For example, it is estimated that Arab's oil reserve will be depleted by 2070 and hence the world is in urgent need of alternative energy production.

To sum up, alternative energy source will emerge as a force to reckon with in meeting the world's energy shortage and replacing fossil fuel. With the right research and use of modern technology, we can foresee a pollution free world of energy.

Sentence: This gases are

Sentence: This gases are responsible for the global warming and climate change.
Description: A determiner/pronoun, singular is not usually followed by a noun, plural, common
Suggestion: Refer to This and gases

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