The June 2012, Rio + 20 conference on sustainable development advocated the "green economy" model. In whose book the term 'green economy' was coined?
1. Amartya Sen, D. Friedman, Samuelsan
2. D. Pearce, A. Markandya, E. Barbier
3. I. Quadeer, W. Berry, N. Hatekar
4. D. Greenberg, J Taylor, Schmidth