Abstract assignment

Would anyone please correct my paragraph ? I am not a native speaker so I doubt that I made the following translation properly:

Abstract Assignment



The green building movements had been occurring in Battery Park City in 1999, and this project was to create the green buildings. From the green building, it can save much more energy efficiency than regular building, because it uses solar energy, and reuse the heat. In addition, it saves water by reused from the toilet, air-conditioner, laundry, and shower. It also filtered air twice and increase the indoor air quality. However, green buildings are more expensive than regular building. In conclusion, there is a two choice, either pay less money and waste energy, or pay little bit more money but save energy.