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Pollution - Environmental Pollution
Pollution refers to any undesirable change in the physical, chemical or biological characteristics of our environment, i.e. air, water and oil that may or will adversely affect humans or other species and life support systems of our biosphere directly or indirectly. A substance whose introduction into a resource damages the latter's usefulness is called a pollutant. Pollutants are grouped into two broad categories:
The non-biodegradable pollutants such as heavy metals, pesticides, move through the food chain and may get magnified to dangerous levels in higher trophic level organisms. Some of these combine with other compounds and produce toxic substances. However, biodegradable materials such as human and animal wastes, agro-based residues and fertilisers can also pose a threat if their quantities or inputs exceed the Assimilative capacity of the environment.
Skeletons of radiolarians The skeletons of radiolarians and foraminiferans form a primary constituent of ocean bottoms where they form 30% or more of the sediment. It is calle
Q. Fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission. What is that mechanism? Fluoxetine is a substance that inhibits
In a word, what process provides the energy for muscle contraction
What is Electron Cloud Model ? Electron Cloud Model : In recent models of the atom, electrons form electron clouds, in which electrons travel in spherical and dumbbell-shap
Another type of soil for bacteria gardens Boil some rice or potatoes in a dish unless well cooked. Drain and save the water. Use the bouillon cube to the gelatin. Use th
A leaf is detached from a tree and tested with iodine. The leaf turns dark blue. (a) What does this result tell you? (b) Why is this result not sufficient e
Q. Can you explain Tannins? Tannins are another class of compounds which interfere with the absorption of minerals like iron and reduce the availability of proteins by bindin
Define How to Prevent the Cancer? A continuing and urgent need is there to take all steps to prevent cancer. Cancer rates are set to increase another 50 percent by the year 202
what is meant by thigmotropism?
what are the theories of animal classification
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