Scientists have discovered that increased levels of ocean acidity and carbon dioxide concentrations have resulted in unexpected changes in oceanic chemical processes. Their research results are published in the March 7, 2007, issue of the journal Geophysical Research Letters.

European Commission President Jose Manuel Barroso says the cost of combating global warming is far less than the cost of doing nothing.

Forests of spruce trees and shrubs in parts of northern Canada are taking over what were once tundra landscapes--forcing out the species that lived there. This shift can happen at a much faster speed than scientists originally thought, according to a new University of Alberta study that adds to the growing body of evidence on the effects of climate change.

Breaking news in recent years has been swamped with stories of extreme weather -- flash floods in East Asia, prolonged drought in Africa, destructive hurricanes like Hurricane Katrina, heavy monsoon rainfall in South Asia, and an historic heat wave in Europe. The effects of these weather crises have been devastating, and their frequency seemingly on the rise.

There is no denying that climate changes have profound impacts on the world and especially on the marine environment. Recent research has shown that the Northern Hemisphere has been warmer since 1980 than at any other time during the last two millenniums. As a result the increase in temperature under climate change was generally higher in northern than in southern European seas.

The French Intergovernmental Panel on Climate Change (IPPC, or GIEC in French) has just announced the conclusions of its 4th report, which restates that global warming has increased the average temperature by 0.74°C over the last century. However, there is very little information about some parts of the planet, such as central Asia.

In a speech on March 1 in New York, UN Secretary-General Ban Ki-moon said climate change poses as much danger to the world as war, and urged the United States to take the lead in fighting global warming.

While Al Gore's film, An Inconvenient Truth, has generated greater awareness of global warming, most people remain unaware of the more rapid warming that has occurred within major cities. In fact, large cities can be more than 10 degrees hotter than their surroundings.

The Greenland ice sheet's contribution to sea level rise increased from 0.23 millimeters [0.0091 inches] per year in 1996 to 0.57 millimeters [0.022 inches] per year in 2005.

North American marine turtles are at risk if global warming occurs at predicted levels, according to scientists from the University of Exeter. An increase in temperatures of just one degree Celsius could completely eliminate the birth of male turtles from some beaches. A rise of three degrees Celsius would lead to extreme levels of infant mortality and declines in nesting beaches across the USA.

The Inuit have spent thousands of years working and living in the Arctic. However, climate change is forcing them to change the traditional way of doing things.

A majority of Americans agree with most scientists that the Earth is getting warmer, but they are divided over the seriousness of the problem, according to surveys conducted by Jon Krosnick, professor of communication and of political science. Their uncertainty is based on a belief-shared by two-thirds of the population-that scientists themselves disagree about global warming.