The EU's carbon trading scheme - deemed a key to tackling climate change - is set to "fail" yet again, says the WWF.

The European Trading Scheme (ETS) was launched in 2005 to cut carbon dioxide (CO2) emissions, but its success was limited, partly due to lax limits.

The wildlife charity is worried that the ETS' next phase will also "fail to deliver" significant emissions cuts.

Failure to cut carbon dioxide levels could cause irreversibly damaging climate change, scientists fear.

http://news.bbc.co.uk/1/hi/business/6748031.stm