Which Indian environmentalist is known as the 'Waterman of India' for his work in water conservation in Rajasthan?
- Sunderlal Bahuguna
- Rajendra Singh
- Medha Patkar
- M. S. Swaminathan
Answer: Rajendra Singh
Rajendra Singh revived traditional water harvesting structures (johads) in Rajasthan, earning him the title 'Waterman of India'.