Everything burns up regardless of size. Big things might not finish burning by the time they hit the ground.
You need either enough thrust to slow you to ~mach 2, or a heat shield to do the same by aerobraking.
It’s called aerobraking for a reason: you’re using friction to turn kinetic energy into heat to slow down, but that heat goes into the air and your heat shield instead of brake pads and rotors.
You’re probably not going to save 95% of the trees given the major earthworks likely needed for managing sewage, stormwater, and other utilities. You’ll probably save most of them, though.
40k looks pretty optimistic for the size and number of buildings, too.
IR thermometers aren’t particularly accurate. Especially when pointed at reflective surfaces like glass, where some of the return will actually be reflected heat coming from you.
Most wall thermostats are designed to read the temperature of the air; the wall behind may be warmer or colder.
Advertisements are now everything but visual. Sounds, smells, tastes, touch, the way the pavement vibrates as a train goes past…
“Greater Canada”.