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. According to reports, he had been suffering from Covid-like symptoms 10 days prior to hospital admission.