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Which one of the following methods of soil conservation is most effective in arid areas?
An ecological system is a:
In which region is Terrace farming done?
Mounds of sand formed by wind action are called:
Natural sources of air pollution are:
Which of the following is considered to be the largest volcano on Earth (in terms of its mass and footprint)?
The topography of plateau is ideal for:
Most of the ozone in the earth’s atmosphere is found in the:
Plantation of trees on a large scale to check soil erosion are called:
The narrow stretch of water connecting two Seas is called: