网友回答：
意思连惯，saving the earth how to protect the environment becomes one of the biggest problems in the world. we can find the rubbish not only pollutes our environment but also harms people s health. so we should not throw rubbish onto the ground. some factories
温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。
