The Environment Agency has decided to submit a bill on attaining Japan's reduction target for greenhouse gas emissions to the 150-day regular Diet session beginning in January 2002, agency sources said Saturday.

The agency envisions including two economic measures in the law. One would impose an environment tax on oil and other fossil fuels, and the other would allow companies and local governments to trade emission rights, the sources said.

But the law may stipulate only that the measures will be introduced, without specifying details. Working out an environment tax and an emission rights trading system could be left to later discussions among government officials, the sources said.