Four such activities are-

a. By reusing things instead of throwing away. Example – old clothes, toys etc. can be given to needy people, plastic bottles of jam, pickles can be used to store other things etc.

b. We can recycle things like paper, plastics, metals, glass etc.

c. We can use waste water that is produced from water purifier in watering plants, moping floor, cleaning vehicles etc.

d. Using CFls bulbs, fluorescent tubes which consume less energy instead of conventional bulbs or tubes.