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Carbon allowances were little changed by midday Friday, with spread trading in focus.

EU regulators need more time to verify airline emissions data before deciding a cap.

Germany will oppose any plan to introduce CO2 tariffs on imports from poor countries into the EU.

Alberta tar sands emissions are 10 per cent higher than conventional crude oil, a study finds.

The economic crisis will turn some countries from buyers of CERs into sellers, one analyst said.

China has approved higher feed-in tariffs for wind power projects.

The Pacific Carbon Trust delivered 35,000 carbon credits to offset government emissions.

The Climate Action Reserve is considering developing forestry protocols for Mexico and Brazil.

Carbon allowances ended a shade down on Friday, despite upward moves in most energy prices.

US business groups fear the US cap-and-trade bill could trigger a green trade war.

Nine senators called for a briefing on the USDA's controversial study of the House climate bill.