the protection of valuable things and resources
conservation
harmful materials that spoil and damage the air, water and soil
pollution
to do with living things
biological
the growth of crops and plants
cultivation
organized activities over a period of time to achieve or teach something
campaign
to supply water to crops by tubes or small channels.
irrigate
What is Deciduous forest ?
The trees and many of the plants lose their leaves in the hot season and grow fresh ones in the rainy season .
When type of plant or animal ceases to exist by dying out
extinct
an event causes serious damage
disaster
change the crops grown on the land regularly
crop rotation
the gradual wearing away by wind and water
erosion
A device which sprays water over a large area
sprinkler
to make the soil or water salty
salinization
liquid or solid waste
sewage