railway RRB JE (CBT I + CBT II) Mock Test 2024 General Knowledge Ecology and Environment Conservation efforts: India and World
Which of the following is/are useful effort(s) for sustainability of resources?
a. Switching off unnecessary lights and fans
b. Using lift instead of stairs
c. Repairing leaking taps for conserving water
d. Using empty containers to store things
e. Going to school by your own car instead of cycling
1
Only e
2
Only b
3
a, c and d
4
b and e