De or het stroombesparing?

The correct Dutch article is:

de stroombesparing

Rule Words ending in -ing: almost always de. See the rule

How to use stroombesparing

the stroombesparingde stroombesparing
this stroombesparingdeze stroombesparing
that stroombesparingdie stroombesparing
our stroombesparingonze stroombesparing
your stroombesparingjouw stroombesparing
every stroombesparingelke stroombesparing
which stroombesparing?welke stroombesparing?
a big stroombesparing / the big stroombesparingeen grote stroombesparing, de grote stroombesparing