--------- is the relation of plants and living creatures to each other and to their environment

-------- is the process of development which do not cause harm to their environment

Resources that have the ability to re appear themselves by recycling, reproduction or replacement even after usage

Which of these is a non-renewable resource

----------represents a continuous process of exchange of water from the earth surface to the atmosphere and atmosphere to earths surface under the influence of solar heat

Consequences of drought

Stagnation of water in the soil in the upper layers is called

Process of accumulation of pesticide within the cell of an animal is called

Increased concentration of soluble salts in the soil

Which of these is a non conventional energy source

Which of these is a conventional energy source

--------- is the thermal energy due to magnetic or radioactive processes within the interior of the earth

Any change in land that alter the conditions or reduces the quality and hence its productivity is called

Practice of preservation, maintenance & sustainable utilisation is called