Indian billionaire Mukesh Ambani along with three other Indians are among the world's wealthiest 'eco barons' who continue to make investments in green technology and businesses.
The 'Green Rich List' compiled by The Sunday Times features 100 wealthiest people including four Indians and one India-origin person.
Apart from Ambani who is ranked at the fifth position, other Indians in the list are wind power major Suzlon Energy's Tulsi Tanti (49th rank), Jaypee Group founder Jaiprakash Gaur (50) and former executive at engineering entity Thermax Anu Aga (78). India-origin venture capitalist Vinod Khosla is at the 52nd place.
The list is topped by legendary investor Warren Buffett with a "Wealth Green investment" worth 27 billion pounds. He is followed by software czar Bill Gates and Sweden's Ingvar Kampard, at the second and third positions, respectively.
"The Green List has unearthed 100 tycoons or wealthy families worth 200 million pounds or more who have made either serious investments in green technology and businesses or hefty financial commitments to environmental causes. In total, the Green 100 are worth nearly 267 billion pounds," the publication said.
Gates have green investment worth 26 billion pounds while Kampard has invested 22 billion pounds.