Question

list 4 changes one can make in her habit to become more environment friendly

Answer 1

Plant one tree energy year and watch it growing.
Stop using polythene bags. Use paper or cloth bags instead.
Stop using products like fur, ivory, derived from wildlife.
Switch off unncessary lights and fans.
Take a bus in place of personal vehicle where possible.
Use CFL in place of bulbs.
Wear an extra sweater in place of using a heater or a sigri on a cold day.

Answer 2

plant a tree 
use cycle for travelling short distances
get the pollution checkups of vehicles done regularly
recycle,reuse , reduce