he wants to show us the new bridge to zhuhai and macau. for chung, it's another symbol of beijing's power and influence. the e longest sea a crossing on earth, linking t three majoror cities on the pepearl rivever d. bubuilt with chinese money.. but t professor chchung doesn't trust china's leadership. >> one thing the beijing side should do is to give more room for hong kong people, and to stick to the idea of one country, two systems. keepining their promise is the best way to gain the confidence and trust of hong kong people. >> but beijing has other ideas. as the mainland turns up the pressure, the sense of freedom in hong kong is gradually being eroded. >> this week in global i ideas,e asascend to the lofty heights f the andes, where deforestation of high-elevation woodland is a huge p problem. our reporterer claudia laszczk met villagers in peru who are planting tens of thousands of new trees in an effort to combat climate change. >> quena raymi is a very special festival held once a yeaear in e peruvian andes. it's a tree-planting c