Men'S Jewelry,Panel Chunky Necklace,Four Cornered Star Necklace,Four Cornered Star Men'S Necklace Huayao Master (Puyang) Automation Equipment Co., Ltd. , https://www.huayaolive.comLujiao Edition 6 "Resource Problems and Their Performance" ppt 1. Give an example of the main resource problems and their causes 2. Give an example of the importance of non-renewable resources for social and economic development and the impact of resource depletion on human activities 3 Illustrate the problems caused by human's unreasonable use of renewable resources