The challenge is to place economic value on natural assets in a way that makes the most of growth opportunities and sustains the resource while also delivering the most valued benefits. Most often these assets are economically “invisible”, or their value is only captured through marketed products, such as timber, where incentives for sustainable management are weak. Brazil and Costa Rica have both created mechanisms for rewarding activities that conserve and sustainably use natural assets (Box 1.3 in Chapter 1, Box 2.5).