Noted environmentalist and Padma Vibhushan Sunderlal Bahuguna, who was being treated for Covid-19 at AIIMS hospital in Rishikesh, died on Friday. 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 …