Conservation is the preservation or efficient use of resources (in an efficient or ethical manner), or the conservation of various quantities under physical laws.
Airports are big energy consumers – and that’s before a plane takes off or lands. The daily electricity and thermal energy used by a large airport compares to that of a city of 100,000 people.
EN 
CS
DE
ES
FR
HU
IT
PL
PT
РУ
SK
TR
УК
AR
中文
