If you suddenly had complete control over time, space, and matter for only 24 hours. Essentially being a God for a day. 

How would you save this world?

Please be very detailed. Just in case an actual diety is browsing the Fediverse looking for ideas. 

 @78ea7bf1 Id get rid of all the men except me, and just keep the women with nice boobies that want to have babies.  What a glorious world it would be.