The man doesn't know the price of groceries. He's completely detached from society and real life.

The climate catastrophe is a whole fuckload of problems caused by humans changing the climate. It's not just "it gets a little warmer" it's death of habitat for various species, it's ocean acidification, it's weather changes, it's crop failures.

It'll lead to things like mass migrations of people from places that are no longer habitable due to a loss of access to water or food, or because their homes get flooded or destroyed by severe weather. We might see camps as massive populations migrate, there'll be infrastructure problems. We'll see starvation, and disease, perhaps another pandemic.

As people migrate to other places there'll be border disputes, xenophobia, increased nationalism. We might even see people get shot as they're trying to enter other countries, it's not like we don't see that already.

The problem isn't "it gets a little warmer" is everything else that follows.

he probably knows, and he doesnt care, which is why his "philantropy" seemed extremely disingenuous.