ABSTRACT
Solar energy is not like any other energy! The Sun plays a central
role in our existence: the Sun heats the globe to an acceptable
temperature; otherwise, thanks to geothermal effects, it would be
just a bit more than the −270◦C prevailing in the Universe. And the Sun is at the origin of life. Photosynthesis, a highly complex quantum
process that involves four photons hitting a molecule at the same
time, is the source of life. And that is not even acknowledging the
fact that to begin with there was no free oxygen at all in Earth’s
atmosphere: all the oxygen we breathe today has at some point been
liberated through photosynthesis.
