You might be right, but I'm wasn't saying we should ban all use of any technology that has any negative effects, but that we should at least try to understand all the effects before taking it into use, and try to avoid the worst outcomes by regulating how to use the tech. If it turns out that fossil fuels are the only way to achieve modern technology then we should decide to take the risk of the negative effects knowing that there's such a risk. We shouldn't just blindly rush into any direction that might give us some benefit.

Regarding competition, yes you're right. Effective regulation is impossible before we learn global co-operation, and that's probably never going to happen.