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|The shrinking of Lake Chad|
Lake Chad, one of the world’s largest lakes, has been shrinking dramatically since the end of the 1960’s. Climatic parameters, unregulated water exploitation for irrigation farming, as well as high population pressure, have all contributed to the lake shrinking to 10 per cent of its former size.
|Flash floods in Thessaloniki|
Floods are considered one of the most catastrophic natural disasters. They affect more people than any other natural disaster, posing serious risks for people’s lives, properties and infrastructure. Due to the increasing frequency of severe flood events, as well as evidence of global climate change and rise in sea levels, floods are now considered a serious threat.
|The Gulf Stream|
The Gulf Stream is a warm, fast flowing current that forms the western boundary of the North Atlantic Gyre. During its course, its temperature gradually drops as it releases heat into the atmosphere.
| Earth from Space: Image of the week Image archive |