Business CO2 tax 'part success'

Climate concerns halt coal plant
The US state of Georgia blocks construction of a new coal power plant based on concerns over carbon emissions.

Natural lab shows sea's acid path
Natural CO2 vents on the sea floor show scientists how life will be affected as carbon emissions acidify the oceans.

US climate change bill is blocked
A US law that would have introduced a cap on carbon emissions is blocked by senators.

Summit calls for climate targets
European and Japanese leaders call for quick cuts in carbon emissions with major private sector funding.

EU 'windfall for power companies'
A report accuses the EU of handing cheap profits to power firms under its scheme for buying and selling carbon emissions.