1997One serious environmental hazard which may result from the destruction of the zone layer is?See more
1997Which of the following human disease is often heightened by the introduction of irrigation farming in an area?See more
1997The most important environmental resources that sustains natural processes in an ecosystem is?See more
1997Villages which lie along the foot of a chalk escarpment at head stream points are referred to as?See more
1997The process by which population becomes largely concentrated at certain locations is called?See more
1997An agricultural practice where water has to be artificially provided during the rainy season is referred to as?See more
1997Which of the following countries is one of the major producers of petroleum and also a net importer of the product?See more