Renewable energy in Albania take part in choosing location including: altitude, site accessibility, infrastructures, protected areas, and power grid. The wind speed is 8–9 m/s in many areas of Albania. Albania might export excess wind energy to Italy. Geothermal energy could also be used in Albania. It comes from warm water sources from underground soil. Geothermal energy comes from the heat generated by the Earth. There are some spots called hot spots that generate more heat than others. There are natural wells near Albania’s border with Greece. This energy could be used for heating purposes. Geothermal energy in Albania is under study and there
London Underground cooling hot air. Conventional brakes on trains rely on friction to slow the train down, transforming kinetic energy into heat. More modern trains feature regenerative braking systems that can feed the energy from braking back into the power supply, minimising heat generation. This has the additional advantage of reducing the amount of brake dust produced by the trains. London Underground cooling In summer, temperatures on parts of the London Underground can become very uncomfortable due to its deep and poorly ventilated tube tunnels: temperatures as high as 47°C (116 °F) were reported in the 2006 European heat wave. Posters may be