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Since the Industrial Revolution, humans have been emitting GHGs into the atmosphere at an accelerating rate. Once in the atmosphere, greenhouse gases absorb thermal radiation and re-radiate it back towards Earth’s surface. This process is known as the Greenhouse Effect and has been contributing to climate change, increasing the frequency and severity of extreme weather events, contributing to sea level rise, and accelerating extinction rates. It threatens our air, water, and food, and must be addressed. Fortunately, steps are being taken to help fight climate change and reverse the Greenhouse Effect. Automobile manufacturers are improving vehicle efficiency, renewable energy is becoming more competitive with fossil fuels, and individuals are becoming more cognizant of their carbon footprints. Unfortunately, one of the largest contributors to climate change is not receiving as much attention as it should. As a sector, buildings are the largest global emitter of CO2. In the US, buildings account for 39% of CO2 emissions, and 70% of existing US homes were built prior to energy codes. Despite major savings from green retrofits, they are not yet mainstream. Three key barriers are responsible: (1) a lack of awareness of energy savings; (2) a lack of technical expertise for retrofits; and (3) a lack of available capital for retrofits. The third barrier is especially important; despite potential savings, many homeowners cannot afford retrofits due to associated first costs. In California, average residential green-retrofits cost $15,000, have 165% returns-on-investment, have simple paybacks of three to five years, and generate 25% savings on utility bills. Retrofits make homes more efficient, help fight climate change, and save homeowners money. A self-sustaining fund could finance retrofits and regenerate every three to five years from energy savings. The question is, how to start such a self-sustaining fund? In 2006, American runners and walkers raised $714 million for charity, a 9% increase from 2005. Despites the impressive amount of money raised, not one penny went to the environment. There are no running/walking events for the environment and no environmentally-focused charity organizations for runners and walkers to raise money for; hence the mission of Sustainable Steps – to organize running events to start a self-sustaining fund that will finance green retrofits of residential properties at $0 net cost to homeowners.