Environmentalist Sunderlal Bahuguna, a founding member of the tree-hugging Chipko movement in the 1970s to prevent their felling, died of Covid-19 at a hospital in Rishikesh on Friday. “Due to Covid-19, he also developed pneumonia which worsened his health condition along with high blood sugar and hypertension.” Tributes poured in as soon as the news of Bahuguna’s death broke. Prime …