launch a cleaning drive in surrounding involve your neighbours. many kinds of air, water and soil pollution and various diseases related to them can be avoided.
Stop using plastic On holidays, make it a habit don’t carry your things in plastic Instead, take a cloth and cotton bags, or rigid bags that you can reuse with you.
It is difficult to find a space to make farm or garden in a city but if you have one, make and maintain a small farm or garden. You can grow fruits and vegetables in it
Adopt the 5R mantra-- Refuse, Reduce, Reuse, Renew and Recycle. The concept is already taught to students at school but the problem is that elders have forgotten about it.