Plasma (Ionized gases) 64 Gases 26 Greenhouse gases 20 Kinetic theory of gases 14 Ionized gases 13 Thermodynamics 9 Chemistry 8 Climatic changes 8 Liquids 7 Dissertations, Academic (Ph.D) 6 Global warming 6 Physical chemistry 6 Plasma 6 Thesis (Ph.D)-Physics 6 Meteorology and Climate 5 Gases, Rare 4 Ideal Gases 4 Physics 4 Solids 4 Air pollutants 3 Air pollution 3 Atoms 3 Climatic change 3 Emission 3 Environmental impact 3 Greenhouse gas mitigation 3 Kinetic theory of gases; Mechanics of gases; Physics 3 Molecular theory 3 Molecules 3 Plasma instabilities 3