So, let's think of previous global crises. What would be the bottom-up way to handle, say, the acid rain crisis, which was caused by excessive sulfur dioxide e

So, let's think of previous global crises. What would be the bottom-up way to handle, say, the acid rain crisis, which was caused by excessive sulfur dioxide emissions and was resolved by top-down legislation. Or alternately, what would be the bottom-up solution to World War 2?