Given below are the names of some environmentalists who strived for a sustainable earth for everyone. Find out more details about them and complete the table.
| Sl. No | Name of the Environmentalist | Their Contribution | |--------|------------------------------|---------------------| | 1 | Sunderlal Bahuguna | | | 2 | Saalumarada Thimmakka | | | 3 | Tulsi Gowda | |
What is the biggest challenge faced by our world today?