Trading Environments’ collective approach permits some summary and discussion of wide-ranging characteristics of environment and trade as distant environments were rapidly integrated into the circuits of emerging world markets. These we discuss here in terms of the work of valuing environments, discovering nature and natural limits in business, the power of calls for improved environments, and the surprising characteristics and work of trading environments, before addressing the contribution of the volume to further research in environmental history. However, since each chapter investigated a specific combination of commercial knowledge, environmental transformation, settlement and technical frontiers, associated with specific trading environments, and each contributed findings constrained by these contexts, it is useful to briefly summarize these separate findings in terms of the trading environments, frontiers and knowledges discussed.