Working with the Scientific Committee on Problems of the Environment, Susan co-authored
the Emerging Challenges section of the United Nations Environment Programme's Global Environmental Outlook (GEO) Yearbook for 2003, which addressed the alteration of the nitrogen cycle and over-fishing.
But there's nothing in LK that requires as much skill as the toughest and most cleverly planned balloon rides, swimming
sections, and spike gauntlets in NZS, and it's NZS that ultimately
emerges as the more
challenging, rewarding, and enjoyable of the two titles.