Solar PV (photovoltaic) systems generate electricity when sunlight falls on solar panels which are normally made of crystalline silicon and mounted on the roof of the home or other building. Although a great deal of energy is consumed in the manufacture of PV systems, one installed they should continue to produce virtually free electricity for up to 20 years. - Description added by: www.microchap.info

The internet and other modern communication networks are vital to the global economy, but they are also significant consumers of electricity and carbon producers – from the construction to the ongoing consumption (data centre construction is now limited by the lack of available power to keep them running). At the same time, they offer a route to reduce carbon production from transport and buildings as people can work from home or reduce their business travel. - Description added by: David Lockie