1. INTEGRATED APPROACH OF THE RISK AND ENVIRONMENTAL IMPACT. CASE STUDY – PREREQUISITES OF A NATECH EVENT AT A NATURAL GAS COMPRESSOR STATION. Authors: ALEXANDRU OZUNU, CRISTIAN MALOȘ, NICOLETA BICAN-BRIȘAN, ALEXANDRA KOVACS.2. NATURAL RADIATION DUE TO RADON. CASE STUDY: RADON CONCENTRATION IN HOUSES FROM APUSENI MOUNTAINS. Authors: PETRONELA DAVID, BETY-DENISSA BURGHELE, MIRCEA CLAUDIU MOLDOVAN, NICOLETA BICAN-BRIȘAN.