Life Cycle Environmental Impact Analysis of HDPE Packaging Materials for Different Disposal Options -- Excess Pressure in Municipal Water Supply Systems as a Renewable Energy Source: Antalya Case Study -- Bio-Fuel Production from Carbondioxide Gas In Polluted Areas -- Examination of Soil Improvement with Reusing Tires and Pets -- Recovery of Phosphorus and Nitrogen from Sewage Sludge as Struvit…