Several non-governmental organizations (NGOs) in Delhi are actively engaged in tree plantation and combating pollution. Here are some notable ones: Delhi Greens New Delhi, India Founded in 2007, Delhi Greens focuses on environmental education, awareness campaigns, and tree plantation drives to promote sustainable development. DELHI GREENS Hara Jeevan New Delhi, India Established in 2015, Hara Jeevan aims to plant 10 million trees by 2040 and engages in waste processing and environmental awareness programs. Sarvachintan Foundation