Transnational trade holds opportunities for prosperity and development if accompanied by a robust political and legal framework. Yet, where such a framework is missing, transnational trade is frequently associated with, among others, negative impacts on the environment. Applying a legal comparison, this article assesses if recent free trade agreements, i.e., the Mercosur Agreement, CETA and the EU–Vietnam Free Trade Agreement, negotiated by the European Union, have been underpinned with effective environmental standards so that they are in line with global environmental goals and avoid detrimental effects on climate and biodiversity. Besides that, we evaluate the extent to which these agreements at least enable and incentivise environmental pioneering policies in the trading Parties. In particular, we discuss the likely impacts of the agreements on the agricultural sector. The analysis finds that, while a few mandatory standards concerning, e.g., deforestation have been established, overall, the agreements lack a comprehensive legal framework to uphold/enhance environmental protection. Moreover, weak dispute settlement mechanisms to ensure compliance with sustainability measures limits their effectiveness. In addition, the provisions on regulatory cooperation and investor-state dispute settlement are likely to negatively affect the decision-making processes and (thus) discourage ecological pioneering policies in the trading Parties. Hence, there is a long way to go so that transnational trade is compatible with global environmental goals.