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  Water insecurity is defined as the lack of a reliable source of water, of appropriate quality and quantity to meet the needs of the local human population and environment. It is often caused by water sc...

The formation of a waterfall begins when geological differences occur in the rock over which a river flows. The most common set up is a layer of more resistant 'cap rock' lying on top of a larger layer of...

Erosion is the wearing away of the bank of the river as well as the bedload it transports. There are four main forms of river erosion. Firstly, Hydraulic action is where the force of the ...

Erosion is the process of wearing away the rock and soil found along the river bed and banks.  Erorsion also occurs through the breaing down of the rock particles which are being carried away by the river...

The term 'shrinking' planet is another way of referring to the process of globalisation, or the deepening and strengthening of ties across transnational borders. This manifests itself in two main ways - g...