Noted environmentalist and Padma Vibhushan Sunderlal Bahuguna, who was being treated for COVID-19 at AIIMS hospital in Rishikesh, passed away on May 21, 2021. The 94-year-old Chipko movement pioneer was admitted to the hospital on May 8 after his oxygen levels started fluctuating. Sunderlal Bahuguna was a life-long environmentalist and was credited for founding the Chipko movement—the grassroots movement that swept through the Garhwal region in the 1970s with villagers hugging trees to stop them from being axed. Later in the 1990s, he spearheaded the Anti-Tehri Dam movement and even went to jail for it in 1995.

Source: https://www.indiatoday.in

Source: NTPC