Developing countries have not participated in the WTO-led negotiations aimed at bringing down barriers to trade in environmental goods. If negotiations conclude, would the win for trade and for the environment be extended to a win for developing countries? This column draws insights from a newly assembled comprehensive dataset on barriers to trade in environmental goods and provides evidence that tariffs and non-tariff barriers are still an impediment to trade while similar regulations stimulate it. A larger list of environmental goods would entice developing-country participation, but this will also require protecting developing countries from challenges at the WTO.