As the high-stake climate talks here enters its sixth day, negotiators appeared confident that some kind of deal will be reached before next weekend and they will be able to avert a repeat of 2009 Copenhagen summit -- that failed spectacularly.

Stern said he had four to five meetings with Indian counterparts in the last one week and both nations are working "quite intensively in a business and constructive way".

His statement came in the backdrop of Secretary of State John Kerry's remark ahead of the talks here on the outskirts of Paris that India will a 'challenge'.

Ministers from around the world will descend on Paris on Monday to try to transform the blueprint into a binding deal that can cap the rampant emissions of greenhouse gases and slow global warming.

India is expected to become the world's biggest importer of coal by 2020 as it seeks to meet its energy requirements. India's national climate plan, submitted ahead of this meeting, suggests a significant role for coal going forward.

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