Nowadays, we meet the majority of our energy needs by burning fossil fuels such as coal, oil or gas. Every day this releases millions of tons of nitric oxide, sulfur dioxide, carbon monoxide and dust as well as billions of tons of the greenhouse gas carbon dioxide. But there are alternatives such as solar cells or wind and hydroelectric power stations.

The conversion of sunlight into electricity and warmth experienced a real boom and, finally, has become affordable for private households.

The idea of a flying wind park sounds like something from science fiction, but suitable areas all over the world are being sought for large wind power stations, and great hopes are being placed in wind power plants at sea.

The power of the seas can also be used to produce energy. A wave power station on the Scottish island of Islay has been providing electricity since 2001. The possiblities, it seems, are endless.