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Natural Resources

Man has to be dependent on natural resources despite all the scientific inventions,Natural resources are the basis of national income

Man has to be dependent on natural resources despite all the scientific inventions,Natural resources are the basis of national income

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Animal resourses<br />

In biomedical research, experimental animals have taken on enormous importance as models<br />

for elucidating and predicting behavior, health, and disease or for information regarding basic<br />

biologic processes. In most areas of research, there is an increasing recognition that constant,<br />

dependable experimental conditions are essential in order to obtain reproducible and reliable<br />

information. Most investigators are aware of the need for a research system with as few<br />

variables as possible, but oftentimes the experimental animal is not considered.<br />

In a living organism, there are two basic sources of variation — genetic and environmental.<br />

Accurately defined, standardized, and properly housed laboratory animals are needed in order<br />

to accomplish meaningful biomedical research. Use of animals harboring overt or latent<br />

diseases, housed in crowded, unsanitary conditions, or maintained in an environment which<br />

results in abnormal behavioral and physiological responses certainly compromises and brings<br />

into question the validity of research accomplished.<br />

Also, there is concern for the comfort and well-being of the experimental animals themselves. It<br />

is unacceptable to subject them to needless suffering or deprivation. Scientific, legal, and ethical<br />

considerations have prompted standards that are becoming increasingly comprehensive and<br />

rigorous for the handling, care, and use of experimental animals.<br />

Coal resources<br />

Coal is a fossil fuel of sedimentary origin that has formed by coalification of vegetation over<br />

millions of years. Black coal consists of the higher rank anthracite, bituminous and subbituminous<br />

coals. The lower rank brown coal is sometimes known as lignite. In Australia coal

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