Introduction to Environment and Trade Principles and the interface:assessable

Topic 1. Introduction to Environment and Trade Principles and the interface:assessable
Topic 1 – Introduction Assessable Question:

The argument about ‘trade’ and ‘environment’ sometimes is like a fraternal struggle. Trade policy and environmental policy exhibit a number of similarities, certainly in their economic and social impacts, so that their differences are frequently felt as betrayals."
(From Whither MEAs?The Role of International Environmental Management in the Trade and Environment Agenda Konrad von Moltke: Page 5)
http://www.iisd.org/pdf/trade_whither_meas.pdf
How do you perceive the linkages between the Trade and Environment agendas?