All in all, they want to create a better environment from the nature. Also, they want to connect some countries, so the relationships will increase positive. 1. They want to build a barrier across the Strait of Gibraltar, to turn the Atlantic into a huge dam reservoir.
2. Northern Africa will have more fresh water. The nearest potential source is the second largest river in the world, the Congo, but it flows through a volatile and dangerous region.
3. Irrigation engineers in California accidentally flooded a depression in 1905, that lay below sea level. The result was the Salton Sea, the largest lake in the state. The idea is to flood it with seawater from the Mediterranean, just 50 kilometers to the north.
4. The idea is to link Asia and North America at the Bering Strait, in between Russia's north-east corner and Alaska. At its narrowest point, the strait is 82 kilometers across, and never more than 50 meters deep.
5. The idea is usually to build a dam in a place where the water level on one side will drop because of evaporation. Wherever there is a narrow bit of sea, someone has suggested installing concrete.
6. Building artificial islands or peninsulas has become routine, with some astounding ones being made in Dubai, for example. But existing methods require deep quarries and deep pockets.
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