No one knows how much warming is "safe". What we do know is that climate change is already harming people and ecosystems. Its reality can be seen in melting glaciers, disintegrating polar ice, thawing permafrost, changing monsoon patterns, rising sea levels, changing ecosystems and fatal heat waves.

Scientists are not the only ones talking about these changes. From the apple growers in Himachal to the farmers in Vidharbha and those living in disappearing islands in the Sunderbans are already struggling with the impacts of climate change.

But this is just the beginning. We need to act to avoid catastrophic climate change. While not all regional effects are known yet, here are some likely future effects if we allow current trends to continue.

Relatively likely and early effects of small to moderate warming:

  • Rise in sea level due to melting glaciers and the thermal expansion of the oceans as global temperature increases.

  • Massive release of greenhouse gases from melting permafrost and dying forests.

  • A high risk of more extreme weather events such as heat waves, droughts and floods. The global incidence of drought has already doubled over the past 30 years.

  • Severe regional impacts. Example: In Europe river flooding will increase and in coastal areas the risk of flooding, erosion and wetland loss will increase substantially.

  • Natural systems, including glaciers, coral reefs, mangroves, Arctic ecosystems, alpine ecosystems, Boreal forests, tropical forests, prairie wetlands and native grasslands, will be severely threatened.

  •  The existing risks of species extinction and biodiversity loss will increase.

  • The greatest impacts will be on the poorer countries least able to protect themselves from rising sea levels. There will be spread of disease and declines in agricultural production in the developing countries of Africa, Asia and the Pacific.

  •  At all scales of climate change, developing countries will suffer the most.

Longer term catastrophic effects if warming continues:

  • Greenland and Antarctic ice sheets are melting. Unless checked, warming from emissions may trigger the irreversible meltdown of the Greenland ice sheet in the coming decades, which would add up to a seven meters rise in sea-level over some centuries. New evidence showing the rate of ice discharge from parts of the Antarctic means that it is also facing a risk of meltdown.

  • The slowing, shifting or shutting down of the Atlantic Gulf stream current is having dramatic effects in Europe, disrupting the global ocean circulation system.

  • Catastrophic releases of methane from the oceans are leading to rapid increases in methane in the atmosphere and the consequent warming.

Never before has humanity been forced to grapple with such an immense environmental crisis. If we do not take urgent and immediate action to stop global warming, the damage could become irreversible.

The latest updates

 

Greenpeace launches a campaign for mandatory

Image | July 8, 2008 at 20:51

Greenpeace launches a campaign for mandatory fuel efficiency standards by demonstrating the high CO2 emissions of cars in India. CO2 a major greenhouse gas is the biggest contributor to climate change

Greenpeace launches a campaign for mandatory

Image | July 8, 2008 at 20:51

Greenpeace launches a campaign for mandatory fuel efficiency standards by demonstrating the high CO2 emissions of cars in India. CO2 a major greenhouse gas is the biggest contributor to climate change

Greenpeace launches a campaign for mandatory

Image | July 8, 2008 at 20:51

Greenpeace launches a campaign for mandatory fuel efficiency standards by demonstrating the high CO2 emissions of cars in India. CO2 a major greenhouse gas is the biggest contributor to climate change

Fuel efficiency law need of the hour, says Greenpeace

Feature story | July 8, 2008 at 5:30

NEW DELHI, India — Greenpeace today launched a nationwide "Let's Drive Change" consumer campaign to support the Bureau of Energy Efficiency in creating strong mandatory fuel efficiency norms for the car industry in India. To highlight the climate...

Electronics companies have poor policy to combat climate change: Greenpeace's latest...

Feature story | June 25, 2008 at 5:30

BANGALORE, India — Out of the 22 electronics companies, only Sony-Ericsson and Sony score above 5/10 in the latest version of the Greenpeace Ranking Guide to Greener Electronics, while the overall score on global scale has plummeted as Greenpeace...

Greenpeace activists occupy a billboard in

Image | April 29, 2008 at 20:13

Greenpeace activists occupy a billboard in Delhi to highlight the effects of Climate Change

Greenpeace activists occupy a billboard in

Image | April 29, 2008 at 20:13

Greenpeace activists occupy a billboard in Delhi to highlight the effects of Climate Change

Greenpeace activists occupy a billboard in

Image | April 29, 2008 at 20:13

Greenpeace activists occupy a billboard in Delhi to highlight the effects of Climate Change

Greenpeace activists occupy a billboard in

Image | April 29, 2008 at 20:12

Greenpeace activists occupy a billboard in Delhi to highlight the effects of Climate Change

Greenpeace activists occupy a billboard in

Image | April 29, 2008 at 20:12

Greenpeace activists occupy a billboard in Delhi to highlight the effects of Climate Change

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