In my city we all like to use are cars to get everywhere we want to, but what if we used Bart to get to San Francisco and what if we used the county bus. All of these would save gas and would release less carbon to the world. We could carpool from school and back home with some of your friends and not everyone needs a new phone every time one comes out. Every day in school we always keep all of are lights on and we all have the air condition on. All of or classrooms have at least three windows that we can open at any part of the day.  At my friends houses that i go to nobody turns off and lights and they all have their air condition on all day long. I think in my city we have a lot to change and we need to think about our Earth.