are cities need to be sustainable because that is the only way that we can stop global warming.

Hello everyone from Slovenia!
I don’t use a lot of motorized vehicles for my transport, because I live 5 minutes of walking away from school, and I also go everywhere by feet in my town, beacuse it’s a small town. When I go to other, bigger cities with my friends we usually take train or bus, but when I travel with my parents we always go with car. We go on vacations to foreign countries twice a year and we usually fly there. I know that i don’t produce a lot Carbon Dioxide, but I am trying all the time to reduce my carbon footprint.

Hello everyone! I usually use public transportation to go almost everywhere, as we have no car at home. I use to go to downtown, and the school also is five miles from my house. And to go training, I have to take two buses, or sometimes I bike, it takes me almost half the time in coming. But I can not always use it for the climate time. The bus stop is near my house, so it is quite comfortable. But normally takes 20 minutes to pass each bus, which is quite long, so if you miss the bus miss much time. Also for the morning is usually filled, this makes it take longer to reach my destination. I would like to be more frequent buses.

I travel a lot on buses, which are always full of people so I have to go on foot. I see it in recent years there are many foreign people who use this means of transport. In most cases take the bus because in my house for the weekend no car and it seems less polluting than a car. I prefer to go by car as well because you get faster to the places you want to go while on the bus going to have to go through different stops to reach your destination. I use the bus to go to school and go to the city, but always have to be pending since the time the buses leave every half hour.

I know that personally I would like to see an electric tram system like in the town of Bremen in Germany. I found it very convinient and useful.

Hello, my name is Bethany. I am a sophmore at North Adams high school. I recently participated in the carbon footprint challenge. I believe transportation should be changed to where we don’t leave such a major impact on our enviroment.

Hello, I am from Southern Ohio and my school recently participated in the carbon foot-print challenge. I was wondering if anyone had any ideas as to why the carbon emission from transportation is higher for rural areas? Thanks.

Hello, I would like to share my thoughts about a perfect sustainable city with you :) !
First of all I want to say that in my country unfortunately there are only a few cities that are really bicycle-friendly. For example in Osijek (where some of my friends live and which has about 115.000 inhabitants) there are many bicycle lanes, but definitely not in my town (although Pozega is much smaller and it wouldn’t be so difficult to plan bettre cycling infrastructure)! And what about you? Do you promote cycling and try to reduce car emissions in your hometowns?
I think that the motor traffic in my perfect sustainable city would be reduced and that there would be many pedestrian zones and that people would enjoy walking freely with their children.
Moreover, there would be enough trash containers and recycle bins and people would become more environmentally conscious (in Pozega we have just a few of them, and I wonder what’s the situation like in your towns?)
There would be a lot of parks and green spaces as well and the citizens would grow fruits and vegetables in their gardens and the air would be perfectly clean.
So, what do you think – wouldn’t it be lovely to live in an eco-city? Can you add some new ideas to my description? I look forward to hearing your opinions. :)

Smart waste bins at the University of Washington send digital signals to waste collection when it’s time for pickup.

Writ large, such a system could save tons (of CO2) in unnecessary disposal truck emissions.

“Imagine a scenario by which our country’s most populous state, notorious for freeways, traffic nightmares and smog, could reduce driving by 3.7 trillion miles by 2050 (compared to trends forecast under business as usual), the equivalent of taking all cars off the state’s roads for 12 years. Imagine saving 140 billion gallons of gasoline through 2050, reducing oil consumption by an amount roughly equivalent to seven years’ worth of all US offshore oil production. Imagine saving some 3,700 square miles of California farmland, forests, recreation areas, and other currently open space that would otherwise be lost to sprawl. Imagine eliminating 140 premature deaths and 105,000 asthma attacks and respiratory symptoms each year…”