Lots of ideas have been put forward. Going from something that works in a lab to something that works on a global scale is not easy. And anything that big might have risks or unintended consequences and/or huge costs. Getting international agreement and co-operation would also be an issue. There is also no obvious incentive for a particular country to launch into it because none of the technologies would have a useful local effect. There would have to be some strong international push-pull factor to get projects underway - combined with international agreement that the method is safe.
Have things improved in your 60s?


