In the past the city has primarily relied on the sun to do the work.
The local economy always relied primarily on fishing and the fish trade.
Almost a billion people now rely primarily on fish for protein.
I thought *insects* rely primarily on their sense of smell.
The work relies primarily on the Bible for its subject matter.
About 75% of the country's population relies primarily on the subsistence economy.
The games have relied primarily on the creation of 3D assets.
Another thing I take from the declaration is that developing countries will have to rely primarily on their own resources.
The team has primarily relied on Peterson as a specialist.
A decision would also, of course, be political, but it must rely primarily on technical assessments.