India said on Thursday that it is voluntarily willing to reduce carbon emission by 20 to 25 percent by 2020, but it is not going to sign any legally binding agreement at the Copenhagen climate summit.

Indian Minister of State for Environment and Forest Jairam Ramesh said at the Lok Sabha, or Lower House of Parliament, that "India will never accept a legally binding emission reduction agreement".

"We are telling the world that India is voluntarily ready to reduce emission intensity by 20 to 25 percent in 15 years from 2005," he said.

"There is no question on compromising on these two issues although it depends on concessions," He said, adding "we get from the international community."

He also said New Delhi will adopt a series of measures, including mandatory fuel efficiency standards on all vehicles.

"There are some attempts by some countries that developing countries should announce when their emissions will peak. We will not sign a peaking year agreement. This is not acceptable," he said.

But India is willing to do more only through voluntary measures, he added.

The opposition Bharatiya Janata Party has called on the Congress-led government not to compromise under the pressure of developed countries on carbon emission reduction.