You can often see turtles or lizards basking in the spring sun. The reptiles are not able to maintain a constant temperature in their body, it changes in relation to the ambient temperature. For this reason they are also called cold-blooded animals. The heat of the sun is necessary for them to warm up their body and for the development of the bones
There are many places in the world where the electricity grid does not reach the villages and dwellings, or it would be too expensive to install. But small off-grid systems can be found in the cities as well, for example the solar panels supplying the BUBI stations.
The International Space Station, ISS set up by the five - American, Russian, Japanese, Chinese and European - space agencies also use solar energy.
Between March 2015 and July 2016, Solar Impulse 2 aircraft was the first to fly around the globe with 16 landings, without using a single drop of fuel. It flew 42 thousand kilometers. More than 17 thousand solar cells supply the 72-meter wingspan plane with power, operating four electric motors and also charging the batteries of the machine. The batteries make it possible to fly by night too.