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.

7. Afforestation is the planting of trees on a large scale to check soil erosion. 

Rafael Nadal, the Spanish tennis player, defeated Dominic Thiem in the final to claim the 2018 French Open men's singles title. This victory marked Nadal's 11th French Open title, showcasing his dominance on the clay courts of Roland Garros.

The Kalinga Prize is an international award given by UNESCO (United Nations Educational, Scientific and Cultural Organization) for outstanding contributions to the popularization of science. It is awarded to individuals who have effectively communicated and popularized science to the public, promoting a better understanding of scientific issues and fostering scientific literacy. The award is named after the ancient Indian kingdom of Kalinga, which is present-day Odisha in India.