These days, people are trying to live in a "green" way. Advocates of living in greener (community) think it is not a good idea to delay (solve) environmental problems. They say we can use ideas and technologies available (create) the city of the future today.
For example, in the green city of the future, modern buildings (design) to save water and energy. Outdated buildings of the past were not. Rooftops covered with grass and other living plants provide insulation (隔热材料) keeps buildings cooler. These roofs can also collect and reuse rainwater that would otherwise be wasted.
Besides, citizens of the green city understand that protecting native species (be) the key to protecting natural spaces. Because native plants are original to the ecosystem, they provide the best habitats local insects' bird and other animals. Native plants can also (well) adapt to the local climate and require less water.
Residents also recognize that a process called composting(堆肥) helps reduce amount of solid waste and increase the richness of local soil. People first mix food waste with water and air in large bins. Then (hen) bacteria break down this pile of "garbage" "into an eco-friendly and economical fertilizer.
