Which statement is the most accurate?
60% of the earth`s land surface is now used to grow crops and graze animals.
Ganga and Yamuna rivers are covered under the Ganga Action Plan-I and II.
9.73% of the total global supply of water is available for human consumption.
The 14 major river systems are a part of the Ganga action plan.
If waste materials contaminate the source of drinking water which of the following diseases will spread?
Scurvy
Typhoid
Malaria
Anaemia
Which of the following wastes cannot be decomposed by bacteria to form compost?
Kitchen wastes
Plastic and polythene bags
Dead plants
Bodies of insects living in the soil
Decomposers include
Bacteria
Fungi
Both a & b
Animals
Which one of the following is an example of biotic component of environment?
Wind
Water
Vegetation
Temperature
Air pollution is caused by
Insecticides
Sewage
Smoke
Loud speakers
Chief source of energy in environment is
Fire
Moon
Sun
Stars
Global warming has resulted due to
Increased emissions of fine particulates from automobiles
Increased emissions of CO2 from automobiles
Oxides of sulphur and nitrogen
Lack of rainfall worldwide
Medicine of quinine is provided by
Eucalyptus plant
aconite plant
cinchona plant
money plant
Air is composed of gases, water vapours and
dust particles
rainfall
snowfall
light
