Urban planners and city officials in many communities are striving to encourage and improve bicycle ridership in their urban areas. Bicycle riding in cities is environmentally friendly and economically sound. Geographer Juliet Jacobs looks at efforts to bring more bicycles into cities in her latest article, Urban Bikes.

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hi mr matt .how are you?i am studing climatology can you give me a general information about climats and its classification .note that i cant speak english very well.i thans you about this site and your information that you send for me later .thank you mr matt