“There’s no ambiguity about the data,” said Gavin Schmidt, a climatologist and the director of the NASA Goddard Institute for Space Studies. “So really, it’s a question of attribution.”
Understanding what specific physical processes are behind these temperature records will help scientists improve their climate models and better predict temperatures in the future.
Assuming you’re asking in good faith, the difference would be helping someone through this hell-hole that’s already here, and was disadvantaged at the start. As opposed to bringing someone in.
On top of that, having kids carries a massive carbon footprint. An adopted kid is already penciled in for that. I’d even wager a kid in the system would be more of a burden on carbon levels than one in a home.