These are substances which cannot be broken down by the activity of microorganisms. These substances go on concentrating at each trophic level of food chain, e.g., DDT and heavy metal (mercury, cadmium, etc.).
These are substances which cannot be broken down by the activity of microorganisms. These substances go on concentrating at each trophic level of food chain, e.g., DDT and heavy metal (mercury, cadmium, etc.).
Generally, tetraethyl lead is added to petrol to make it burn smoothly in motor vehicles. However, burning of petrol in automobiles releases toxic lead compounds through the exhaust pipes of automobiles. Continuous inhalation of these compounds causes anaemia, brain damage, convulsions and even deatRead more
Generally, tetraethyl lead is added to petrol to make it burn smoothly in motor vehicles. However, burning of petrol in automobiles releases toxic lead compounds through the exhaust pipes of automobiles. Continuous inhalation of these compounds causes anaemia, brain damage, convulsions and even death.
What are non-biodegradable substances?
These are substances which cannot be broken down by the activity of microorganisms. These substances go on concentrating at each trophic level of food chain, e.g., DDT and heavy metal (mercury, cadmium, etc.).
These are substances which cannot be broken down by the activity of microorganisms. These substances go on concentrating at each trophic level of food chain, e.g., DDT and heavy metal (mercury, cadmium, etc.).
See lessList main sources of water pollution.
(i) Sewage; (ii) Industrial wastes; (iii) Synthetic soaps and detergents; (iv) Fertilizers and pesticides; (v) Petroleum; (vi) Heat.
(i) Sewage; (ii) Industrial wastes; (iii) Synthetic soaps and detergents; (iv) Fertilizers and pesticides; (v) Petroleum; (vi) Heat.
See lessName two fresh water sources which provide fresh water for human use.
1. Ground water; 2. Surface water (ponds, lakes, streams, rivers, etc.).
1. Ground water; 2. Surface water (ponds, lakes, streams, rivers, etc.).
See lessWhy is lead compound added to petrol? What is its harm?
Generally, tetraethyl lead is added to petrol to make it burn smoothly in motor vehicles. However, burning of petrol in automobiles releases toxic lead compounds through the exhaust pipes of automobiles. Continuous inhalation of these compounds causes anaemia, brain damage, convulsions and even deatRead more
Generally, tetraethyl lead is added to petrol to make it burn smoothly in motor vehicles. However, burning of petrol in automobiles releases toxic lead compounds through the exhaust pipes of automobiles. Continuous inhalation of these compounds causes anaemia, brain damage, convulsions and even death.
See lessName two examples of green house gases which contribute maximum toward global warming.
Carbon dioxide and methane.
Carbon dioxide and methane.
See less