The Indian government is likely to announce new, bigger and more effective climate change targets by January 2015 when US President Barack Obama visits the country. The announcement is likely to include an 'aspirational' peaking year for India's greenhouse gas emissions and stricter emission intensity targets.

"We will exercise multiple options available to us for a more sustainable and environment-friendly development of capacities. This includes increasing focus on supercritical plants," a senior executive from NTPC Ltd, India's largest power generator said. "Our renewable energy targets will also become more ambitious."

Supercritical plants are up to 10% more costly than the traditional subcritical machines but produce less carbon-dioxide for every unit of generation. Every 1% increase in efficiency leads to a 2.5% cut in CO2 emissions per unit of generation in a supercritical plant.

NTPC has over 2,600 Megawatt (Mw) of supercritical capacity out of a total of 43,000 Mw of total installed base of generation capacity. "Already, we have over 16,000 Mw of supercritical capacity under construction at various locations. The plan may be further boosted," the executive said. NTPC also plans to increase its renewable capacity base from the current 95 Mw to 1,000 Mw by 2017.

India's total carbon-dioxide emissions stand at 1,745 million tonne annually with per capita CO2 emission at 1.5 MT, much lower than the world average of 4.5 MT. However, former Prime Minister Manmohan Singh had in 2007 announced India is determined to see its per capita emission never exceed those for developed countries. Also, the government had in 2008 committed to a 20-25% cut in its carbon intensity by 2020, over 2005 levels.

The new climate change strategy currently underway may include revision of these targets. At 38%, electricity sector is the largest contributor to India's total carbon emissions followed by agriculture sector (17.5%), transport sector (7.4%), residential sector (7.2%) and cement sector (6.8%).

India has a current installed power generation capacity of 253,000 Mw. Supercritical plants account for less than 30% of total coal-based capacity. The country plans to ramp up supercritical machines' share in total coal-based capacity to 50% by the end of the current Plan period and 90% in the 13th Plan ending in 2022.

A power sector executive said the government's focus on implementation of Renewable Purchase Obligations (RPOs) targets by states would help the nation meet its renewed commitment to fight climate change. Under the RPO regime, state distribution utilities have to mandatorily procure a certain part of their power purchase from green sources like solar and wind generators. The idea is to push installation of renewable capacities.

Data shows India may not have succeeded in curbing carbon emissions as expected, at least in the power sector. According to the latest Carbon-Dioxide baseline database sourced from the Central Electricity Authority (CEA), the weighted average emission rate of Indian power plants declined consistently from 0.82 tonnes of CO2 per MWhour in 2008-09 to 0.78 TCO2 per Mwh in 2011-12 but rose to 0.83 TCO2 per Mwh in 2012-13.

An expert group on low carbon strategies headed by former Planning Commission member Kirit Parikh had in May 2014 recommended a host of measures to realign India's carbon mitigation schemes including market linked pricing of fossil fuels, cess on generation, streamlining policies for energy efficient buildings and use of energy efficient equipment in industry.

While the recommendations are under discussion, the Union cabinet had on Tuesday cleared the final brief for the negotiating delegation to the Lime talks on climate change, led by environment minister Prakash Javadekar, that began on Monday.