The Environmentalist Foundation of India (E.F.I) is an environmental conservation group based out of Chennai, Hyderabad, Puducherry, Bangalore, Trivandrum, Mumbai, Delhi, Kolkata and Coimbatore which focuses on wildlife conservation and habitat restoration. Started in 2007 and registered in 2011, the organisation is known for its work in cleaning and scientific restoration of lakes in India for biodiversity. The organisation and its efforts grew from one pond in Chennai to include over 167 water bodies in Andhra Pradesh, Chhattisgarh, Delhi, Gujarat, Jammu & Kashmir, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Odisha, Puducherry, Rajasthan, Tamil Nadu, Telangana, Uttar Pradesh and West Bengal in the last 14 years (2007 to 2021).