There’s cloud seeding … What if China seeded some clouds which cause a torrential rainfall and flooding in Mexico

Or the exact opposite: what if China is successful? Cloud seeding doesn’t change the amount of moisture in the air, only where it falls. If you do succeed in getting it to fall prematurely, that means it’s not going to fall where it would otherwise have.

Any earthbound intervention is likely to be similar: even if you’re successful in modifying local weather, you’ve also modified someone else’s weather, and likely not for the better

Humans have gone to war for less