Watch the video clip and answer the following questions. 1. What are the consequences or reasons of metals being so easy to recycle by humans? ----M ost of what ___1___ from our end-of-life stuff, if it makes it to a recycler, are the metals. I t is ____2_____ because metals are very easy to ___3_____ from other materials and from one another. T hey have different densities, different electrical and magnetic ____4_____.and even they have different colors. S o it ’ s very easy for either humans or machines to seperate these metals from one another and from other material 2. What does the author think of Enviromental Arbitrage( 环境套利 )? Enviromental Arbitrage( 环境套利 ) is not __5___, is not safe, and is not sustainable.