As negotiations on climate change gathered momentum in Copenhagen, India has said it will play a constructive role but will not accept legal-binding and verifiable domestic emission cut commitments. Environment Minister Jairam Ramesh asserted that India has announced voluntary domestic measures to tackle global warming. But progress on these will be checked only by the country's Parliament. In a related development, China and the United States could not agree on key issues ranging from sharing the burden of slashing greenhouse gases, monitoring and climate debt to be paid to the poor nations by the United States. <br/><br/>