You might want to do some basic math on the current rates at which renewable energy and global energy demand is growing.
The world burned 140,000 TWh worth of fossil fuels last year, a new record because global energy demand is still growing faster than total new renewable generation.
Let’s say we built an island of floating PV panels in the ocean large enough to generate that much energy.
It would be the 8th largest country in the world.
No we’re not going to hit 70% by 2035 even assuming it maintains exponential growth, not even close.