De or het koolstofdioxide-emissie?

The correct Dutch article is:

de koolstofdioxide-emissie

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

How to use koolstofdioxide-emissie

the koolstofdioxide-emissiede koolstofdioxide-emissie
this koolstofdioxide-emissiedeze koolstofdioxide-emissie
that koolstofdioxide-emissiedie koolstofdioxide-emissie
our koolstofdioxide-emissieonze koolstofdioxide-emissie
your koolstofdioxide-emissiejouw koolstofdioxide-emissie
every koolstofdioxide-emissieelke koolstofdioxide-emissie
which koolstofdioxide-emissie?welke koolstofdioxide-emissie?
a big koolstofdioxide-emissie / the big koolstofdioxide-emissieeen grote koolstofdioxide-emissie, de grote koolstofdioxide-emissie