So if they increase the energy supply by investing/purchasing in renewable energy that would increase supply which would bring their energy costs down hypothetically?
Note Google in some cases does sell electricity generated from their wind/solar investments to the locals and new FERC order allows anyone who has DG to sell into wholesale markets. Sometimes their investment is near a data center so it hits the same local feeder, othertimes they say 'we can't do DG near the data center, so lets do it somewhere else that offsets the data center demand'. This is where the renewable energy credits come in and make the long term strategy worthwhile
the headline is quite misleading when you consider most google data centers still getting power from dirty sources - the 40% reduction in data center cost is impressive though (whoo AI!)
