Success guaranteed

What’s something you would attempt if you were guaranteed not to fail.

If I was guaranteed not to fail, I would like to prepare machines that would be used for converting the pollution caused by the vehicles into a different composition (a gas which can reduce harm to the nature) with the help of a chemical reaction .

Also I would keep this as an option: To help people who collects plastic articles from the oceans and beaches so that many innocent aquatic organisms don’t lose their life so painfully.

Thank you