21. A variety of trees, woodland and prairie plants cover the slopes of the stream valley. 22. The clear, dry air and sparse plant cover allow sunlight to heat the desert surface. 23. The Sierra de Manantl�n's varied and complex plant cover harbours a great wealth of flora. 24. Research has shown that non-native plant cover is positively associated with post-wildfire seeded grass cover. 25. The former gaseous diffusion plant covers of the site. 26. The plant covers , with three assembly lines each long; at peak production, it employed 180, 000. 27. The plant covers an area of approximately 214ha. 28. The gaseous diffusion plant covers of a site. 29. Wind moves sand and smaller particles, especially in arid regions where there is little plant cover . 30. Remarkable paintings representing persons, animals, and plants cover the walls and the ceiling of the church.
