|  | If we are  to green our communities, we need to green the systems that  frame,  connect and sustain them. We need to rebuild our largest 100   metropolitan regions which contribute to 80% of our nation’s economy.   To do so, a comprehensive national strategy is essential to plan and   coordinate federal investments that rebuild our communities in an era  that  demands immediate solutions to climate change. 
 
 |  | To enhance  America’s global competitiveness, and address key concerns  regarding  energy security, regional prosperity, and quality of life, we need  a  cohesively planned and integrated, national freight, inner-city  passenger,  and regional commuter transit system. The national,  integrated  system must be regarded as a whole-network in lieu of  disparate parts,  and planned in conjunction with housing, water and  sewer systems,  energy and data systems, green open space, and the  social, cultural and  educational systems that make regions thrive. 
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 |  | Buildings’  consumption of electricity, oil and gas generate 42% of the  country’s  green house gases. Since only 1% of our annual building stock  consists  of new construction development, we need to build green but  also to  focus on successful strategies for the greening of the existing 99%  of  building stock. New credit enhancement programs to guarantee small   second mortgages to help the home and building owner finance green   renovations. Energy savings of 20-30% are easily achieved by simple   improvements such as increased insulation, improved windows, and   smarter energy controls. 
 |  | Transit  Oriented Development is typically defined as development within  a  quarter to a half a mile of a transit stop, whose design is oriented  toward  improving access to and use of transit. The development orients  to transit  by enhancing safe pedestrian and shared vehicle connections  to transit.  To provide the transit system with sufficient ridership,  the development  needs to be dense and there needs to be a mix of uses  along the system. 
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 |  | Why mixed  use? Economic, ecological and social health all stem from  diversity.  Healthy cities are diverse cities. Our communities will  continue to  need greater resiliency to respond to the growing stress of  population  growth, globalization, and climate change. Mixed-use developments  and  communities can draw from a broader range of resources to  provide this  resilience. Mixed-use communities are also more likely to  have a  healthy job/ housing balance which help to reduce commuting  time and  costs for citizens and to maintain a steady cash flow within the   neighborhood by creating reliable assets. 
 |  | As  demonstrated in the Hope VI program, the economic and social  benefits  of income mixing to communities and residents are enumerable.  However,  most of our Federal programs are either aimed at specific  income  brackets, typically those below 60% of median income or have  no income  focus but cost limits, both of which tend to support market  sprawl  development. The most effective current mixed-income financing  tool is  the 80/20 tax exempt bond program. Additional programs to  further  increase the mix of incomes in projects using tax exempt bond   allocations following the 50/30/20 model need to be promoted as well. 
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 |  | Low,  moderate and middle income families spend between 54-64%  of their  income on their combined housing, energy and transportation  costs,  often spending more on transportation then housing. Locating  affordable  housing within walking distance to affordable transit is essential  if  families are to save and invest in their future. Transit accessible   affordable housing also provides families with access to greater  employment  and educational opportunities that are essential to their  livelihood.  Green housing is healthier for the labor that builds it,  its residents and the  community. 
 
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