Who is Swami Prem Parivartan, aka ‘Peepal Baba’ and why he is grabbing attention for Delhi-Dehradun expressway

Swami Prem Parivartan, popularly known as Peepal Baba, claims to have planted 40,000 sheesham trees along the Delhi-Dehradun Expressway. The environmentalist, who has spent decades planting trees, plans to add another four lakh to the stretch.