about 2m-ish I guess? Our eldest miiight be able to make it up there if he wanted to, but he’s a timid momma’s boy with no interest in venturing out of his safe space. His little brother would if he could, but he’s built like a kitbull - all shoulders and stumpy legs, not exactly made for jumping :)
Even aside from the temptation to use offsets to kick the can down the road for reduction targets, the rampant abuse of carbon credits make this absolutely the right decision.
Relevant viewing: Wendover Productions: The Carbon Offset Problem