Climate change

ISSUES

Climate change

The greenhouse effect is a well-known mechanism. It was discovered in the 19th Century : Joseph Fourier described it as early as 1824. Briefly: the gases in the atmosphere absorb some of the energy of sunlight and, in doing so, heat the planet. The more gases there are, the more they heat the planet. There are many gases: water vapour, CO2, methane, nitrous oxide, etc. Thanks to these gases, the Earth's average temperature is compatible with our existence. Without them, it would go down to -18°C.
In 1896, the Swedish researcher Arrhenius calculated that if the amount of CO2 in the atmosphere doubled, the average temperature would go up by 4°C.
A historical modification
Human activity has considerably increased certain greenhouse gases. For CO2, the world atmospheric concentration went from about 280 ppm (parts per million) in 1750 to 380 ppm in 2005. This increase is mainly due to the use of fossil fuels (transport...

NEWS

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FRANCE - SAINT-GERVAIS-LES-BAINS - D'importants travaux de sécurisation d'un glacier du massif du Mont-Blanc viennent de...

UNITED STATES OF AMERICA - WASHINGTON - Le président Barack Obama a promis mardi de continuer à se battre pour faire adopter une législation...

SPAIN - MADRID - La ville de Séville dans le sud de l'Espagne pourrait devenir aussi chaude que Tuscon, dans le désert de...

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DEBATES

A Hard Look at the Perils and Potential of Geoengineering

Jeff Goodell

In the beginning, I had my doubts. The Asilomar International Conference on Climate Intervention Technologies, held last week at...

Grenelle : Peut mieux faire…

Finalement, 3 ans pour faire la révolution écologique, ça...

Agir rend heureux

10:10 est une campagne nationale de mobilisation contre le...

FOCUS

A climate Seattle

The Seattle demonstrations, during the 1999 WTO summit put alter-globalization on the international agenda and influenced negotiations for years. If the Copenhagen summit causes popular mobilization on such a...

VIDEOS

09/06/2010	NASA's MODIS satellite instrument reveals how air pollution may alter...	08/04/2010	Le delta du Nil doit faire face aux défis du changement climatique. La...
07/04/2010	This is the launch video for The Robin Hood Tax campaign. A coalition of...	03/03/2010	The ACT ON CO2 campaign launches its Bedtime Stories TV advert on 9...

GREEN TIPS

In Albi, light is cheap

The town of Albi has installed which are more eco-friendly. These produce good quality white light which...

INDICATORS

Carbon dioxide emissions
Total Primary Energy Supply
Ecological footprint

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