The tough U.S. fuel economy standards announced by President Barack Obama on Tuesday represents a bonanza for companies that supply hybrid technology and other gas-conserving components needed to meet the new benchmarks.

President Obama will announce tough new nationwide rules for automobile emissions and mileage standards on Tuesday, embracing standards that California has sought to enact for years over the objections of the auto industry and the Bush administration.

The White House will unveil an auto fuel efficiency proposal on Tuesday to resolve a dispute between California and the US government over emissions and accelerate the timeframe for sharply improving mileage performance, industry and other sources said.

Democrats in the US House of Representatives have negotiated a climate change bill that would give industries most of the pollution emission permits they would need, according to documents obtained on Friday.

With a series of compromises on the stickiest issues behind them, the House Energy and Commerce Committee is poised to approve far-reaching legislation on energy and global warming by the end of next week. Where it goes from there remains highly uncertain.

The California Air Resources Board (CARB) adopted a low-carbon fuel standard that requires greater use of fuels that cause lower greenhouse gas emissions, compared with gasoline. Corn-based ethanol doesn't meet that test and won't benefit from the new standard, CARB says, because diverting corn into ethanol production increases deforestation and the clearing of grasslands.

The state of California has adopted regulations to curb greenhouse-gas emissions from transportation fuels, codifying evidence that biofuels are significantly dirtier than they were once thought to be.

Atmospheric particles containing lead might have offset the Earth's warming in the 20th century.

This report on Canada forms part of a multi-country effort by the Global Subsidies Initiative (GSI) of the International Institute for Sustainable Development (IISD) to characterize and quantify government support for liquid biofuel production, distribution and consumption. An overview of ethanol and biodiesel, the main fuels evaluated in this report.

The International Fuel Quality Center recently released a ranking of the top 100 countries based on the lowest benzene limits in gasoline. Colombia was at the top of the ranking with the lowest limit, followed by Canada and Luxembourg.

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