Energia

Perez R. and Perez M., 2009. A fundamental look on energy reserves for the planet. The IEA SHC Solar Update, Volume 50

Maailman alkuainekoostumus: https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elements#Earth

The earth is 12,756 km in diameter at a distance of 149.6 million km from the sun.
So the earth subtends 12756/149600000 = 8.53 *10^-5 radians (linear) or
2.28 *10^-8 square radians (areal) as viewed from the sun.
The total area of a sphere is 4*pi*r^2 = 12.6 radians,
so the ratio of the visible size...

https://www.oulunenergia.fi/uutiset/2--2024/oulun-energia-mukaan-kotimaiseen-vetyklusteriin-hydrogen-cluster-finlandiin/

-Energia on kaiken toiminnan perusedellytys - sillä mitään ei tapahdu ilman energiaa: