Suggest any two methods that should be adopted to ensure that the local air and local water bodies are not polluted.

(N/A) $(i)$ Proper treatment of sewage and industrial waste before it is discharged into water bodies to prevent water pollution.
$(ii)$ Increasing the plantation of trees,as they act as natural filters and help in reducing air pollution.
$(iii)$ Strictly enforcing regulations on vehicle emissions to ensure that only vehicles meeting non-polluting norms are used.