India and China have formally backed the Climate Change Accord hammered out in Copenhagen last year calling for voluntary cut in greenhouse gas emissions.

Both the countries on Tuesday submitted official letters to the UN Climate Change Secretariat saying that they agreed to being listed in the preamble of the accord subject to certain conditions.

"It may be recalled that India actively participated in the discussions on the Copenhagen Accord. India stands by the contents of the accord," Environment Minister Jairam Ramesh wrote to the UN climate chief Yvo de Boer.

"The Accord is only an input into the two-track negotiations. The Accord is not a new track of negotiations or a template for outcomes," he said.