"Renewable" refers to energy, not just heat. The sun's energy is be used for other purposes than heat, thankfully.
Growing a 100 trees and chopping them into lumber is less hot than growing 100 trees and burning them.
If all the sun's energy were converted to heat (and not radiated away), we'd be in big trouble. That's what "carbon" pollution is all about -- Carbon dioxide is a greenhouse gas that traps heat. Reducing albedo is one way to increase tempterature, but directly burning stuff is another way.
I think you missed the point of what I said. When we're talking about powering data centers with renewables, talking about sequestering carbon via lumber is rather orthogonal.
The point was, coarsely: using e.g. solar panels only changes the Earth's surface temperature to the extent it changes albedo. (Ignoring second-order effects of concentrating heat and associated effects on radiation, etc.)
Growing a 100 trees and chopping them into lumber is less hot than growing 100 trees and burning them.
If all the sun's energy were converted to heat (and not radiated away), we'd be in big trouble. That's what "carbon" pollution is all about -- Carbon dioxide is a greenhouse gas that traps heat. Reducing albedo is one way to increase tempterature, but directly burning stuff is another way.