Pirsic told a news conference in Rijeka on Thursday that all 13 candidates had answered a questionnaire the association sent them.
Answering the question whether he would support Croatia's withdrawal from the international agreement on the integration of oil pipelines running from Russia through several European countries to the Croatian Adriatic coast, President Mesic wrote that he supported the rule of law. He also wrote that "problems cannot be solved in the streets but by respecting legal and democratic procedure" and that a study on the impact of the project on the environment had been drawn up and an independent body set up to assess the document, Pirsic said.
After it is assessed by experts, the study should be submitted to the public for a debate, after which all options, including a referendum, are open, Mesic replied.
Pirsic said that all candidates answered that they were against allowing the sowing of genetically modified organisms in Croatia.
At the Rijeka conference, the association's activists reiterated that the 759-kilometre Adriatic oil pipeline, of which 610 kilometres go through Croatia, was in poor condition, and posed a threat to the environment.
Miljenko Bakota, a retired engineer, said that safety conditions had not been met entirely during the construction of the oil pipeline (called Janaf) in 1979.