The CHIPKO MOVEMENT (1973) in Uttarakhand, while not a legal case per se, INFLUENCED Indian environmental jurisprudence on:

1. The Chipko Movement began in March 1973 in the Mandal village of Chamoli district, Uttarakhand (then Uttar Pradesh), where villagers — led by Chandi Prasad Bhatt — hugged trees ('chipko' = 'to hug') to prevent commercial logging. 2. The movement, with active participation of women (Gaura Devi), spread across the Himalayas. 3. Sunderlal Bahuguna led the broader Chipko movement. 4. The movement led to: (i) ban on commercial logging in Himalayan forests for 15 years; (ii) Forest (Conservation) Act 1980; (iii) broader environmental consciousness in India. 5. Sunderlal Bahuguna received the Right Livelihood Award (1987); the movement won international recognition. 6. Hence option B is correct. _Source: EPA 1986 / Constitution / International Conventions — Chipko Movement 1973; Forest (Conservation) Act 1980_