Since Poland entered the European Union six years ago, many activities have been undertaken to protect the natural environment, and to put industry on a path toward sustainability. While the creation of environmental products is a long-term process, it can increase the competitiveness of the different industrial sectors and the economy. The aim of our paper is to analyze the competitiveness of environmental goods and services in nine selected manufacturing sectors in Poland to assess their export potential, primarily in third markets, including developing countries (DEV), by calculating RCA, IMP, RTA, and CR indexes. Conducted analysis proved that in recent years Poland had no comparative advantages over DEV in the field of environmental goods compared to OECD countries. It was also shown that increased outlays for environmental protection and the development of environmental technologies is an opportunity to make the analyzed sectors more competitive on the international market.