Environment risk assessment in the event of accident on the main pipelines of Belarus In the framework of the implementation of the international project “Environmental safety of gas and oil pipelines in Belarus" within the Environment and Security Initiative (ENVSEC), an assessment has been done of potential environmental risks in the event of accidents on the main pipelines in Belarus. The project was implemented by ZoĂŻ Environment Network (Geneva, Switzerland) with participation of the United Nations Environment Programme (UNEP) and in cooperation with the United Nations Development Programme (UNDP) and funded by the government of Sweden. The results in the current report follow up on and supplement the work done by colleagues of the Chair of pipeline transport, water supply and hydraulics of Polotsk State University under the guidance of Professor V. K. Lipsky. In September 2015, these specialists