每本20蚊 Book 1 Geographical skills Opportunities and risks Is it rational to live in hazard prone areas? Managing river and coastal environments: A continuing challenge Book 2 Changing industrial location-How and why does it change over space and time? Building a sustainable city-Are environmental conservation and urban development mutually exclusive? Book 3 Combating famine Is technology a panacea for food shortages? Disappearing green canopy-Who should pay for the massive deforestation in rainforest regions? Global warming Are humans responsible? Book 4 Dynamic earth-The building of HK 4本一齊買可議價