IELTS Writing Task 2

Please correct my essay and give me some advice to improve, thank you!

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Alternative energy sources that use the natural power of the wind, waves and sun are too expensive and complicated to replace the coal, oil and gas that we use to power our cities and transport.

To what extent do you agree or disagree with this statement?

Fossil fuel energy has raised various environmental issues and greatly affected life on Earth. Due to this, many people believe using alternative energy sources such as wind, waves and solar power would be more benefical to the environment. However, this idea is against by other people who argued that these type of energy is very costly and complicated to use.

On the one hand, I agree that alternative energy sources bring about some obvious benefits to the environment. Unlike fossil fuel, these sources do not create greenhouse gas emissions which contribute to global warming. Thus, by using these 'green' energy, we can reduce the impact of climate change and the Earth's ecosystem will be maintained. Moreover, fossil fuel are limited sources of energy. With this current usage of human it is worried that these sources will be depleted by the next few centuries. Alternative energy, however, are renewable. We can freely take advantage of these sustainable sources without worrying about them being run out.

On the other hand, I believe that it is very difficult to replace fossil fuel energy with renewable ones. First, in order to use alternative energy we have to establish large generating systems. These systems are usually very expensive and require a lot of effort to build. A further reason is that these alternative energy supplies are not consistent and reliable. They can only be able to operate depend on natural conditions. For instance, solar panels which are used to generate solar power cannot operate at night when it doesn't have sunlight. Similarly, wind turbines are unable to produce wind energy when they are built at dry places where there are barely any winds.

In conclusion, although I agree that alternative energy sources are environmentally friendly, I do not believe they will be able to alter traditional sources due to certain disadvantages.