In the 80s scientists discovered that ozone layer has a growing hole caused by CFCs. All UN members signed the Montreal protocol designed to protect the ozone layer. It has been healing all this time and right now the problem is pretty much solved.
Another good example is year 2000 problem. Computer scientists outlined the problem, got the financing for that and solved it with almost zero issues.
In the 80s scientists discovered that ozone layer has a growing hole caused by CFCs. All UN members signed the Montreal protocol designed to protect the ozone layer. It has been healing all this time and right now the problem is pretty much solved.
Another good example is year 2000 problem. Computer scientists outlined the problem, got the financing for that and solved it with almost zero issues.