The third edition of , released at the American Wind Energy Association conference in Atlanta, ranks 25 countries based on the 2011 sales of the clean technology products they manufacture.
China has the top spot overall, followed by the US and Germany. In wind, the US is fourth behind China, Germany and Denmark.
In 2011, the report says, the global sales value of the clean energy technology sector increased by 10% to almost €200 billion. By 2015, it is expected to rival the oil and gas equipment market when it increases to €240-290 billion.
Policy uncertainty in the US market means it risks losing make share over the long term, the report says.
"Other countries are moving on clean technology opportunities and making big investments in the industry, while US policymakers in Washington seems to be content to let all the recent growth in the US wither on the vine," said Marty Spitzer, director of US climate policy for WWF.
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