【单选题】Recycling Resources (资源再生) Increased population increases the need for natural resources and also increases waste products.Making a new useful product out of a waste product decreases our need for nat...
【简答题】Complete the following sentences with appropriate words in the box. Change their forms if necessary.retainbiodiversesustainablerenewableaffordablecalamityubiquitousinsulationA resource is a natural re...