As the world heats up, the sea levels are rising. Many experts warn that dramatic sea-level rise is global warming's biggest danger. Two main factors are behind this: thermal expansion of the ocean and melting Ice.

First, as the ocean gets wanner from global warming, its volume expands. This is basic science: water expands as it heats up. Thermal expansion has raised the oceans about 10 to 20 centimeters (4 to 8 inches), according to the International Panel on Climate Change (IPCC).

Is global warming causing more extreme weather? Many people seem to think that the last decade's heat waves, hurricanes and droughts did not happen just by chance, but were linked to the phenomenon of global warming.

In 2003, for instance, a ferocious heat wave settled unexpectedly across Europe and killed 35,000 people. Nobody saw it coming.

Time is fast running out to stop irreversible climate change, a group of global warming experts warns today. We have only 100 months to avoid disaster. Andrew Simms explains why we must act now - and where to beginAndrew Simms

Planet earth viewed from space. Photograph: Corbis

The Food and Agriculture Organisation has issued a caution on the repercussions of climate change on fisheries and aquaculture. It is that the changes seen in the seas and oceans will have direct implications for food security. This is particularly relevant to developing countries where about 42 million people work directly in the sector and 2.8 billion depend on fish products for 20 per cent of animal protein.

NEW DELHI: R.K. Pachauri, chairman of the United Nations Intergovernmental Panel on Climate Change, has asked the developed nations to get serious about reducing carbon emissions before it is "too late.'

"Continued greenhouse gas emissions will lead to further [global] warming of 1.8 degree Celsius to 4 degree Celsius over the 21st century,' he said while speaking at a seminar on "Global Warming and Climate Change Challenge

NEW DELHI: The Inter-Governmental Panel on Climate Change (IPCC) has hoped that the ongoing G8 Summit in Japan would address the issue of biofuel policies, including subsidy that was contributing to the rising food prices, which could push an additional 100 million people into poverty.

By Prem Shankar Jha This is one occasion for the world to act to avert the threat posed to humanity by global warming.

New Delhi, July 8: Nobel Prize winning Inter-governmental Panel on Climate Change (IPCC) chief Dr R.K. Pachauri says Indian Meteorological Department (IMD), which has been reluctant in accepting IPCC's predictions on climate change, has unsatisfactory state of affairs. Dr Pachauri is one of the members of Prime Minister's council on climate change which has drafted the recently released India's National Action Plan on Climate Change (NAPCC).

A global report card on nations doing the most, and least, to clean up the environment.

Melting polar ice caps could cause sea levels to rise by up to 25 metres, causing Bangladesh to disappear entirely under water by the turn of the century, according to predictions of climate change by the US government's NASA space agency. One of the UK's prominent newspapers, the Independent, reported on Friday that the globally accepted models predicting gradual climate change could be underestimated according to Nasa's Goddard Institute for Space Studies.