external image first.gif

Ploi acide

Diferenta:
external image acid_raid_vegetation_28412600.jpg


Cum se formeaza
external image ploaie+acida.jpg

Benzen



external image 200px-Benzen.png

Etanol

Ethanol-3D-balls.png
Palas22_500px.jpgMASE PLASTICE DE ZI CU ZI