It would actually probably be a net positive for the US, at least in most places (and at least if you ignore the blowback from the rest of the world). We're less likely to get hit by major precipitation changes, have the technology to shift our agriculture practices to compensate for what changes we do see, and the capital to adapt. A significant (>2°C) temperature reduction is likely to have enough positive effects for us to make it at least a wash. The same is not true for the rest of the world. We all know how much that matters to us, though. This is part of why I'm not optimistic about us keeping this particular genie in the bottle.
It would actually probably be a net positive for the US, at least in most places (and at least if you ignore the blowback from the rest of the world). We're less likely to get hit by major precipitation changes, have the technology to shift our agriculture practices to compensate for what changes we do see, and the capital to adapt. A significant (>2°C) temperature reduction is likely to have enough positive effects for us to make it at least a wash. The same is not true for the rest of the world. We all know how much that matters to us, though. This is part of why I'm not optimistic about us keeping this particular genie in the bottle.