1
caused by gases form factories, power stations and vehicles
2
this is caused by waste products from agriculture, industry and homes (only in water)
3
when an area becomes a desert
4
this is caused by traffic
5
this is wasted by waste products from agriculture, industry and homes (only in land)
6
cutting down most of the trees in an area
7
disappesring of rocks, stones and soil caused by rain, rivers, waves o wind
