All the natural resources can be divided into two categories:
(i) Exhaustible natural resources (ii) Inexhaustible natural resources
Exhaustible natural resources are soils, forests, water, coal, petroleum, natural gas, minerals etc. These are consumed or exhausted through continuous use or misuse. Exhaustible natural resources can be further divided into two-
(a) Renewable natural resources
(b) Non-renewable natural resources
Inexhaustible natural resources are those which cannot be exhausted through continuous use or misuse eq. air and sunlight etc.
The natural resources which are consumed/exhausted/depleted through continuous use and can be recovered by very hard efforts taken up for long periods are called Renewable Resources, for e.g. Soils, forests, groundwater etc. In other words we can say that all renewable resources are replenished through natural cycles or manually. For example oxygen in air is replenished through photosynthesis. 'Forest is maintained themselves and manually. Similarly fresh water is available through cycles & manually too.
Most of the removable resources are interdependent to each other. Forests maintained the environment/climate; plants need to check soil erosion & soil is needed for plants. Air and insects are needed for pollination. Wood, fibre, fodder, fruits, vegetables, milk etc. are developed directly or indirectly by recent photosynthetic activity.
Thus the renewal of these resources will continue at as long as photosynthesis continues on this planet. These resources are the life support system which can fulfill all human needs. But its productivity/renewability is limited or depends upon availability of water, nutrients and environmental conditions.
The natural resources are useful to human society in one way or other. Hence we should ensure a continuous yield of useful plants, animals and materials by establishing a balanced cycle of harvest and renewal (Odom - 1971).
Non renewable resources are not replenished able or we cannot get back our coal and petroleum reserves in our life time, if ones they are consumed/exhausted completely. Non-renewable resources are metals (iron, copper, zinc etc.), coal, oil deposits, minerals, stone, mineral, salts (Phosphate, nitrates, carbonates etc.) etc.
Minerals are often called the 'STOCK' resources, because their new materials can only be extracted from the earth's crust once. But even in the transformed state in which they are used, they are not lost to the planet and so are ideally available for reuse. Metals/minerals come from a very slow process of geo-chemical concentration, which took millions of years to form. Therefore, these deposits which occur today can disappear at some point of time in future.
Coal, petroleum and natural gas are called as 'FOSSIL FUELS' because they are formed from dead remains of plants and animals buried in the earth long ago. They are called fuels because they are burnt to give off energy. Coal have a high heating value, hence it is a useful fuel. Since fossil fuels are non-renewable sources of energy, therefore it is essential to explore more and more alternatives. Today we are utilizing solar energy, wind energy, ocean, geothermal & atomic energy as alternative sources of energy.
Minerals, rocks, salts and chemicals etc. are termed as 'a biotic resources', as biological activity is not involved in their formation. Continuous over exploitation of these resources shall exhaust many of our valuable deposits, which took millions of years to form. They cannot be duplicated within the human scale of time.
Show MoreNon-Renewable Energy Resources
This Project will be in two Parts. The first part is about
Non-renewable energy. Non-renewable energy is a resource that will some day we will run out of. Non-renewable energy is a resource that will some day we will run out of.
The second part is on Renewable energy. Renewable energy is a resource that we will never run out of because it is continually being replaced. The sun is the source of all our energy resources. The sun's energy reaches Earth and is converted into many forms , which we then use to supply our energy demand.
Non Renewable Energy Resources
COAL. One of the most important natural fuels, coal was formed from plant life buried in the Earth millions of years ago. Like…show more content…
These carry away energy from the nucleus, which changes into a smaller, more stable form.
There are two ways which nuclear energy is released by human intervention. The first makes use of elements with very heavy atoms, such as uranium. More energy is required to hold together the uranium nucleus than to hold together two nuclei that are half the size of a uranium nucleus.
In atom bombs and in fission reactors, free neutrons bombard uranium atoms. When a neutron hits a nucleus, the nucleus splits into two smaller nuclei, releasing a great deal of energy. In the reaction, some of the neutrons of the uranium nucleus fly off and hit other nuclei, causing them to split in two and release more energy and more neutrons. The process can continue explosively unless metal rods are inserted in the middle of the uranium to capture some of the neutrons and slow down the reaction. This sort of reaction is called a fission reaction because in it nuclei are broken apart.
The second kind of nuclear reaction is harder to produce and control.
It makes use of the fact that very small nuclei, such as hydrogen and its isotopes, require slightly more energy per proton and neutron to exist than do somewhat heavier nuclei. (The situation is exactly opposite to that of the uranium nucleus, where the lighter