The DESERTEC Foundation, which is being led by major banks such as Munich Re and Deutsche Bank aims to tap into the enormous solar energy potential of the Sahara. Just a small portion of the Sahara could meet all of Europe’s and Africa’s energy needs. Politics are the main barrier, but if this can be overcome, the potential is unlimited.

3 – Solar panels to see the brighter side
The US Department of Energy aims to reduce the cost of solar photovoltaics to $1 per watt by the end of the decade, which would mean that solar panels are finally 100 percent competitive with other energy sources in the absence of subsidies.

4 – Smart windows to cut the AC bill
US e-Chromic, based in Colorado, is developing so called sun-smart windows that automatically change from transparent to reflective on hot days, thus dramatically reducing energy consumed on cooling.

5 – The power of the Sahara

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