Question : The method of soil conservation in which stones, grass and soil are used to build barriers to collect water is called

Option 1: mulching

Option 2: contour barriers

Option 3: rock dam

Option 4: terrace farming

Question : The bare ground between plants is covered with a layer of organic matter to retain soil moisture. This method is called ______.

Option 1: mulching

Option 2: rock dam

Option 3: shelter belts

Option 4: contour barriers

Question : The soil conservation method in which mountain slope is cut into step is 

Option 1: Contour ploughing

Option 2: Cover planting

Option 3: Strip cropping

Option 4: Terracing

Question : Plantation of trees on a large scale to check soil erosion are called:

Option 1: Shelter belts

Option 2: Contour ploughing 

Option 3: Strip cropping 

Option 4: Afforestation 

Question : What are the primary types of environmental pollution?

Option 1: Air, Water, and Noise

Option 2: Air, Soil, and Light

Option 3: Water, Soil, and Thermal

Option 4: Air, Water, Soil, Noise, Light, and Thermal