c12.
Michael Common and Sigrid Stagl’s (2005), Ecological Economics: An Introduction, has five forms of capital (pp 91–92): durable (i.e., material) capital, human capital, social capital, natural capital and intellectual capital. Forum for the Future, as per Jonathon Porritt (2005), Capitalism as if the World Matters, chapter 6, has manufactured (i.e., material) capital, human capital, social capital, natural capital and financial capital.