An item may sometimes be described as being a virtual item when it is a representation or non-tangible abstraction of the physical object, or is a functional emulation or simulation of it.
As an energy carrier, hydrogen inspires a lot of enthusiasm and more than a little wariness. An EU-funded project addressed safety issues related to the use of hydrogen technologies.
EN 
CS
DE
ES
FR
HU
IT
PL
PT
РУ
SK
TR
УК
AR
中文
