First and foremost, everyone can make decisions on where to live. This alone has major impacts on other components of green urbanism. For example, if I choose to live in a 3000 square foot house in a court or cul-de-sac in the middle of a suburban neighborhood, I've already sealed my fate as an automobile-driving, energy intensive American. The house itself is terribly inefficient, and not meant to allow for natural air circulation from open windows. My kids, should I choose to have some, would grow up in the same environment. With no park within an walkable distance, my kids would either play in the backyard, which is truly an unimaginative, dull environment, or sit inside and play video games all day. The neighborhood would probably govern any additions or changes to the house, such as the addition of a green roof. They might not allow it.
A second opportunity for every person to participate in the push towards green urbanism is to ride transit more, or ride your bicycle. Not only is it more healthy for every person to ride a bicycle more, or walk to transit stops, it is also intelligent. Everyday, people that live near you drive in the same direction, possibly to the same general office park or complex. You each drive separately, spending twice (or more) the fuel and money necessary. Instead, you could each ride the bus, along with 15-20 (or more) other individuals. On the bus you could read a book, something that you never have time to do normally with the 30 minutes (minimum) that you spend driving each day. Even better, your choice to ride the bus has influence on the types of land uses or business and retail types that occur throughout the urban environment. More people riding the bus equals more small shops and jobs and density around transit stops, and a more walkable environment.
Third, everyone that currently lives in a suburban home with a yard can easily plant vegetables (and some fruits) in their yard. They can create an urban agricultural base. By growing your own veggies and fruits, you have control over what you eat--and whether or not it contains diseases. By choosing to grow a garden, you also remove lawn space, meaning you no longer go through the ridiculous process of "water grass-mow grass-fertilize grass with synthetic fertilizers-water-mow grass again." You also no longer use fuel to do this. You also discourage the terribly inhumane and unsustainably industrial agricultural systems that have been in place for years. Did you know that illegal immigrants (Mexican) in California's famed fruit agriculture zone get paid vastly under minimum wage (off the books, of course), to farm a region that is supported entirely by irrigation systems, rather than natural precipitation patterns. So, in one fell swoop, you have created a more healthy lifestyle for you and for others, while also helping the environment.
There are plenty of other things you can do directly related to being "green." Retrofit windows to be uber-energy efficient (called passive solar). Put solar panels on your house to reduce your energy consumption from coal power plants. Better yet, look into new windows that may soon have floppy solar sheets installed between the panes. Install rain gardens around your yard below your roof downspouts. Plenty of cool opportunities!
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