De or het luchtemissie?

The correct Dutch article is:

de luchtemissie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use luchtemissie

the luchtemissiede luchtemissie
this luchtemissiedeze luchtemissie
that luchtemissiedie luchtemissie
our luchtemissieonze luchtemissie
your luchtemissiejouw luchtemissie
every luchtemissieelke luchtemissie
which luchtemissie?welke luchtemissie?
a big luchtemissie / the big luchtemissieeen grote luchtemissie, de grote luchtemissie