Renewable & non-renewable resources

The Sources of Energy


Energy can be classified into two main groups. These are Renewable and Non-renewable.
Renewable energy is energy which is generated from sun, wind, rain, tides – in other words, natural sources. This type of energy can be generated over and over, whenever it is needed. They are available in plenty and by far most the cleanest sources of energy available on this planet.
For example: Energy that we receive from the sun can be used to generate electricity. Similarly, energy from wind, geothermal, biomass from plants, tides can be used this form of energy to another form.
Here are some of the pros and cons of using renewable sources of energy:
Pros
The sun, wind, geothermal, ocean energy are available in the abundant quantity and free to use.
The non-renewable sources of energy that we are using are limited and are bound to expire one day.
Renewable sources have low carbon emissions, therefore they are considered as green and environment friendly.
Renewable helps in stimulating the economy and creating job opportunities. The money that is used to build these plants can provide jobs to thousands to lakhs of people.
You don’t have to rely on any third country for the supply of renewable sources as in case of non-renewable sources.
Renewable sources can cost less than consuming the local electrical supply. In the long run, the prices of electricity are expected to soar since they are based on the prices of crude oil, so renewable sources can cut your electricity bills.
Various tax incentives in the form of tax waivers, credit deductions are available for individuals and businesses who want to go green.
Cons
It is not easy to set up a plant as the initial costs are quite steep.
Solar energy can be used during the day time and not during night or rainy season.
Geothermal energy which can be used to generate electricity has side effects too. It can bring toxic chemicals beneath the earth surface onto the top and can create environmental changes.
Hydroelectric provide pure form of energy but building dams across the river which is quite expensive can affect natural flow and affect wildlife.
To use wind energy, you have to rely on strong winds therefore you have to choose suitable site to operate them. Also, they can affect bird population as they are quite high.
Non-Renewable Energy
Renewable energy is energy which is taken from the sources that are available on the earth in limited quantity and will vanish fifty-sixty years from now. Non-renewable sources are not environmental friendly and can have serious affect on our health. They are called non-renewable because they can be re-generated within a short span of time. Non-renewable sources exist in the form of fossil fuels, natural gas, oil and coal.
Here are some of the pros and cons of using non-renewable sources of energy:-
Pros
Non-renewable sources are cheap and easy to use. You can easily fill up your car tank and power your motor vehicle.
You can use small amount of nuclear energy to produce large amount of power.
Non-renewable have little or no competition at all. For eg: if you are driving a battery driven car your battery gets discharged then you won’t be able to charge it in the middle if the road rather it is easy to find a gas pumping station.
They are considered as cheap when converting from one type of energy to another.
Cons
Non-renewable sources will expire some day and we have to us our endangered resources to create more non-renewable sources of energy.
The speed at which such resources are being utilized can have serious environmental changes.
Non-renewable sources release toxic gases in the air when burnt which are the major cause for global warming.
Since these sources are going to expire soon, prices of these sources are soaring day by day.