My sustainable city would have more trees around the entire city so that the carbon dioxide level would be lower and also more oxygen. I would decrease the number of cars and have everyone use public transportation as much as possible to decrease the amount of ground-level ozone which is very bad for the environment. I would also have solar panels as the energy source for the city to help decrease emissions that contribute to global warming.

I agree with you Esmerelda, a sustainable city should have lots of trees to take in the CO2. I also agree with the use of public transportation limiting CO2. The use of all of these items will really help make a city sustainable.

I agree with you Esmerelda.My sustainable city would be more of a green zone on the surface while beneath it there would be roads with electric transportations. On the surface there would be gardens which would raise oxygen level and it would also provide localy raised food. Parks would be all around the city so the kids and adults could spent some time on the fresh air. The city would be building farms of solar panels which would provide the electricity to houses and public buildings. Water which we use for showering would be reused to water the gardens and plants in the yard.

I agree with everything that you have said in this post.  These are all great ideas on ways to reduce carbon footprints of many people in different cities.  My favorite thing that you said is to plant more trees, this is a great idea because oxygen and carbon dioxide levels are very very important.

Alexa S, 15, NC, US

I agree with the city you picture. It is a great example of a healthy city with little pollution going into the earth. I like the idea of public transportation because not enough cities use public transportation.

This city you picture is very good and should be everywhere. The best thing is to plant more trees.