carbono activo

"We believe a standardization of contracts [products] is necessary for the carbon market," he said, pointing to issues such as unit size that remained to be resolved. "Things need to be perfected, and then the carbon market can develop in ways we don't envisage today."

(sobre a Nasdaq OMX e os mercados de CO2, WSJ, http://online.wsj.com/article/SB122462781356956113.html)

Adoraria saber como é que um mercado destes é possível (já nem digo eficiente) sem Estado(s) forte(s) por trás.