Verdissement : par l'entrepreneuriat ou par une action politique?

Free ecology broadly assumes that the protection of the environment hinges on well-defined property rights on natural resources. Such institutional conditions deliver a "double dividend": it both protects environment and creates wealth as shown by studies drawing on the Environmental Kuznets Curve (EKC). That said, the economic growth is all the more sustainable that production and consumption are pollution free, that requirement boiling down to "greening" supply and demand through different types of entrepreneurship. Indeed, the ecological entrepreneur seek to enforce greening along a top down process of a political nature, thus becoming a political entrepreneur drawing on coercion, restriction and taxes in order to impose its business model, in passing legislation and taxation aiming at green purposes (top down greening). Conversely, the green activist can resort to commercial exchange and/or to any civil society initiative to make the economy more sustainable, so that convert into a commercial or a social entrepreneur. Thus, entrepreneurship can spur innovation or leverage the social responsibility of firms based on a grounded action (bottom up greening). What is the most effective form of entrepreneurship among these? Put differently, who makes the best use of scarce resources in order to achieve ecological goals ?