In my city, to throw away our trash, we sort it out into twelve different categories.
In my city, we have to sort out our trash into twelve different categories in order to throw it out.
ご質問ありがとうございます。
① "In my city"=「私の市では」
"to throw away our trash"=「ゴミを捨てるために」
"we sort it out into twelve different categories."=「12分別しています。」
②は①とほぼ同じですが、語順を変えてあります:
② "In my city, we have to sort out our trash into twelve different categories in order to throw it out."=「私の市では、ゴミを捨てるために12分別しなければいけません。」
ご参考に!