De or het kooldioxide-emissie?

The correct Dutch article is:

de kooldioxide-emissie

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

How to use kooldioxide-emissie

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