Označeno: Učinki ogljikovodikov na okolje

https://pixabay.com/photos/fuel-pump-energy-gas-pump-1596622/ https://sl.wikipedia.org/wiki/Eten#/media/Slika:Ethylene-CRC-MW-3D-balls.png https://commons.wikimedia.org/wiki/File:Propane-3D-balls-B.png https://en.wikipedia.org/wiki/Propene#/media/File:Propylene-3D-vdW.png https://sl.wikipedia.org/wiki/Alkin#/media/Slika:Acetylene-3D-vdW.png