Soil erosion is a serious environmental problem. Steps should be taken to curb this problem. Following are some ways to prevent soil erosion:

1. Plant trees on barren lands to prevent soil erosion.

2. Add mulch and rocks to trap plants and grass beneath to prevent soil erosion.

3. Mulch matting can be used to reduce erosion on slopes.

4. Place a series of fiber logs to prevent any water or soil from flowing away.

5. A wall at the base of a slope can help prevent soil erosion.

6. Every house should have proper drainage system so that water can flow into proper water collection systems.

1. The Indira Gandhi Canal is the main canal of Rajasthan. Its old name was "Rajasthan Canal". It flows in the northwestern part of Rajasthan state. It is also called Maruganga of Rajasthan.

2. Rajasthan Canal Board (present name Indira Gandhi Canal Board) was formed in the year 1958.

1. The domed internal landform created by volcanic activity is called a batholith.

2. The process of volcanism includes the process from the formation of magma and gas in the Earth's interior to the formation of lava coming to the Earth's crust and the landforms resulting from it. The explosiveness of a volcano is determined based on the amount of silica in the magma.

3. Classification of volcanoes on the basis of activity -

- Active Volcano: Volcanoes from which lava, gas and fragmented materials are always coming out are called active volcanoes. Stromboli (Sicily), Etna (Italy), Cotopaxi (Ecuador), Barren Island (Andaman Nicobar, India) etc. are examples of active volcanoes.

- Dormant Volcano: This category includes those volcanoes which have not been active for years but can erupt at any time. This category includes Krakatau of Indonesia and Narcondam Island of Andaman.

- Dead Volcano: This category includes those volcanoes in which no eruption has taken place for thousands of years. Chimbarrazo of Ecuador and Kohsultan of Iran are its main examples.