Mumbai, Kolkata most vulnerable to climate change: Govt

India's populous coastal cities Mumbai and Kolkata are most vulnerable to loss of life and properties due to coastal flooding in the second half of the century, the government has said quoting a UN report ahead of a key global climate conference in Peruvian capital Lima.

The UN's Intergovernmental Panel on Climate Change (IPCC) has warned against extreme weather events like occurrence of heatwave, heavy precipitation, droughts, floods, cyclones and wildfire that cause damage to ecosystems and human systems in various regions, Environment Minister Prakash Javadekar said.

"... India is among the top 20 countries and regions most at risk based on analysis of climate risk and coping ability. Mumbai and Kolkata will have the greatest population and assets exposure to coastal flooding in 2070," he said.

The minister's statement assumes significance at a time when representatives of governments are scheduled to meet in Lima from tomorrow for the Climate Change Conference to lay the foundation for an effective, new and universal climate change agreement in Paris in 2015.

Last week, the UN Environment Programme had underscored the need for global emissions to peak within the decade and then to rapidly decline so that the world can reach climate neutrality - also termed zero net emissions -

in the second half of the century.

With climate change impacts worsening and affecting the poor and most vulnerable, governments urgently need to scale up adaptation to climate change, according to the United Nations Framework Convention on Climate Change (UNFCCC).

"Never before have the risks of climate change been so obvious and the impacts so visible. Never before have we seen such a desire at all levels of society to take climate action," said Christiana Figueres, Executive Secretary of the UN Climate Convention.

Figueres said "it is hugely encouraging" that "countries have already been outlining what they intend to contribute" towards the climate action, referring to the recent agreement between China and the US to reduce greenhouse gas emissions.

Climate expert Chandra Bhushan, however, said the deal signed between China and the US "was not in line with the principals of the UN Convention". In Lima, India must work harder with developing countries and push for an ambitious global deal which is equitable and saves the world from catastrophic climate impacts, he said.

"India must push for a principle-based emissions reduction target for all countries. This is the only way the world can remain within the planetary limits," Bhushan said.