[neffy]

The other rather dangerous assumption is that arrogant Californians are the only ones who will try to do this.

The problem is Geoengineering is not a zero sum game - if India decided to try and engineer the next ice age for example, to get access to the shallower parts of the Indian Ocean.

[jaggs]

This is exactly one of the major problems. What happens if a free for all is triggered? Do we get carrier group diplomacy standoffs in various regions to stop nations doing their own bit of engineering? Does the UN step in? So what if it does? It's a nightmare scenario if this stuff takes off.