‘BARCELONA (Reuters) – The global market for carbon emissions trading doubled in value last year, but actual realised emissions cuts fell as the global economic slowdown dented clean energy financing, the World Bank said on Wednesday.
…A total 4.8 billion tons of carbon dioxide, the main greenhouse gas blamed for global warming, were traded last year, up 61 percent from the 3 billion traded in 2007.’
via Global carbon market doubled in 2008, cut less CO2 | Green Business | Reuters.