How to enable Clean Energy Charging on iPhone?

here is settings and then you can go to Settings app and then go to battery housing charging and here you can enable clean energy charging uh clean energy charging helps reduce carbon footprint and it's enabled by default and I don't know what exactly that setting is and how how it works and it says in your region iPhone will try to reduce your carbon footprint by selectively charging when lower carbon emission electricity is available iPhone learns from your daily charging routine so it can reach full charge before you need to use it so here you can just tap learn more with iOS 16.1 your phone can try to reduce a carbon footprint by selectively charging the lower carbon emission electricity is available when clean energy charging is enabled and you connect your phone to a charger your iPhone gets a forecast of the carbon emission in your local energy grid and uses it to charge your iPhone during times of cleaner energy production so here you can just see that uh you can enable that when clean energy charging suspense charging a notification on the lock screen says when your iPhone will be fully charged if you not need to have iPhone full HR sooner touch and hold the notification and then tap charge now so yeah I don't know if this setting is available worldwide or all of that but here is the option