（新教材）2021年高中英语外研版选择性必修第三册课件：Unit 5 Section Ⅰ　Starting out & Understanding ideas .ppt

Section Starting out the algae grow faster in bright sunshine, providing shade; besides, the algae can also 9._ _ (harvest) and used to produce fuel. Therefore, the building reduces the damage to the environment by generating its own renewable energy. Creating buildings such as these 10._ (enable) us to live in closer harmony with our environment. that/which into/to be harvested enables