Whilst the meeting of world leaders in Copenhagen in late 2009 did not ultimately produce a binding climate change accord, the importance of the cleantech sector to the world economy continues to grow. The effects of the economic downturn did not pass the sector by but both mature and developing economy governments are assigning large proportions of budgets to the sector, making the future look bright for businesses within the sector. Cleantech sector report is the second in the series of ten IBR 2010 sector reports.