21.   Other serious environmental problems highlighted by the report are groundwater pollution, inadequate waste-water treatment, soil erosion, and dumping of hazardous waste.

22.   Without the trees, soil erosion in the area accelerated rapidly.

23.   A little-known species of grass, vetiver, could solve the problems of soil erosion, according to the National Research Council of the US.

24.   And he fears that farming is a dead end in places subject to rapid soil erosion and deforestation.

25.   And the cutting of forests has increased soil erosion.

26.   At the same time, roads create environmental havoc, speeding soil erosion, clogging wetlands with debris and destroying streams.

27.   A federal law aimed at reducing soil erosion has a bit more impact on Rothermel.

28.   But at least in the case of soil erosion, agriculture may not be such a big bad wolf after all.

29.   But problems with industry emissions, traffic and even soil erosion are still serious.

30.   But soil erosion is a huge problem for these power projects, too.