Ruki: Those car gasses pollutes the air.

Uruha: I'm using travel/re-usable chopsticks now to fight global warming.

Aoi: Not at the moment. We'd cure the environment if people go back to living the primitive way.

Reita: To help decrease CO2 in the air- don’t use chopsticks at all!

Kai: Global warming!! Every single person should do their part to help the environment!