lack of cleanliness because of uneducated people who don't know about the harmful effects of lack of cleanliness.And over population also a considerable reason for this.to avoid these special campaigns should be conducted in every village by some experts who were trained.government also should work for it.
our present p.m narendra modi started a program called swachh bharat for this.everyone should start cleanliness from their home.so after few years there will be great result.
