[jemmyw]

Scientists aren't responsible for coming up with a plan. Not individually anyway. I think others have expressed that in this thread you've started. An actual plan would be hugely multifaceted and would require a government or large entity to fund it: think about the scope of what that would include, you'd need to bring together researchers and experts on pretty much every industry that exists. You're talking about planning across the entire global economy. We haven't exactly been that keen on planned economies.

Saying that, governments have made policy and it has had an effect. Emissions in Europe and the US are on a steady downward trend.