Advertisements
Advertisements
प्रश्न
List two major harmful effects of the following:
Rivers contaminated with sewage.
List one major harmful effect of the following:
Rivers contaminated with sewage.
उत्तर
- Harmfully affects the animals (even killing the fish).
- harms the plant life growing in it.
Notes
Students should refer to the answer according to their questions.
APPEARS IN
संबंधित प्रश्न
A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
Study the picture given below and answer the following questions :
Water pollution
A lot of fish are dying near a sea shore. Describe any two possible causes.
Name the following
An agricultural pollutant in water
With reference to the sources of water pollutants answer the following question:
In what way does the industrial waste pollute water?
Give few steps to save water.
Water pollution can spread ________ diseases in man.
Excessive use of chemical fertilizers depletes the soil and causes water pollution.
Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?
Household detergents are safe and non-contributors to water pollution.
