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There are many, many answers to what would be the best way to avoid climate change. People are talking about new materials, new sources renewable energy and recycling. Everything is important but not enough to prevent climate change. We all know that carbon emissions from cars are related to the cities, by designing sustainable cities will be more effective contributions toward climate change. To achieve sustainability in cities, we need to consider two key issues; transport and social diversity. Transportation solution has to be planned as a whole because the city is a structure of living, working, and leisure combine together. Transportation has to provide a structure for living and working together but can't just be a system of transport. Cities always need to consider transportation as providing a structure for living and working because it should not be about living one place and working in some...

Designing shared spaces for the comfort and enjoyment of the pedestrian is one of the most important aspects of urban sustainability. The finest cities in the world are cities design with entire networks of car-free and pedestrian friendly environment. Pedestrian friendly cities are growing in popularity because pedestrian friendly streets and squares provides the incredible beauty, enjoyment to the residents on a daily basis. Being able to walk to a mix of shops, restaurants, newsstands, coffeehouses and open-air markets within car-free neighborhoods and work centers delivers the social and economic sustainability and adds great variety and vitality to urban city. Pedestrian friendly environment in Boulder, Colorado Design professionals need to implement shared spaces for pedestrian-friendly environment. Some tactics include planting trees near curbs to reduce optical width of roads, adding bike lanes and wider sidewalks, clearly marked crosswalks, speed bumps, angle park...