Looks like it's about time to announce the next month's challenge!
Challenge for the Month of June
Objective: Reach the final stage of Climate Change in as few turns as possible!
Stipulations: This challenge must be done on Standard Speed and Disaster Level 4 with Standard Resources, and you may not artificially decrease the number of civs or city states you start with, though you may increase it. You can play on any map size & type you want, and can use the leader, city state, and natural wonder pickers. No unofficial mods except for purely aesthetic ones (ones which don't affect gameplay). All official game modes are allowed except for Apocalypse Mode.
edit: Also, Babylon is excluded as a playable civ, to maintain healthy competitiveness among civs. But they are fine to have as an AI player.
Additional Challenge: On top of the main challenge, you can choose to see how quickly you can completely reverse global carbon emissions through carbon recaptures after reaching the final stage. If you choose to also try this challenge, the amount of turns it takes you to bring global carbon emissions back down to zero will be shown next to your main score. Feel free to try this extra challenge if you want to, but if you're pressed for time, don't feel bad about passing on it.
As always, feel free to ask if there's any lingering questions. ^_^