The different indicators of regulatory stringency considered in the present analysis generally support the notion that the stringency of environmental regulations positively affects countries’ specialisation in environmental products, even when considering specific sectors such as solid-waste management or wastewater treatment. While increased trade in environmental products is not an end in itself, the environmental benefits this entails can contribute to global improvements in environmental quality. By increasing demand for environmental products and technologies, environmental policy can complement trade policy in supporting pollution-reduction efforts not just domestically, but also abroad.