A. which seasonal problem plagues our major cities? b. how do the women fulfill need of water?
c. how has water pollution become health hazard?
d. what does the bill introduced in parliament envisage?
e. how can sewage system be improved?
f. what has the survey of developing countries revealed?
g. how is human excreta a major source of disease in India?
h. which new threat is the writer talking about ?​