human 100 Article 98 Greenhouse gases 96 Gas emissions 91 Carbon dioxide 79 Humans 69 Emission control 63 Scanning electron microscopy 61 male 61 female 60 positron emission tomography 58 Carbon 57 Field emission microscopes 56 carbon emission 51 China 50 adult 50 controlled study 49 Field emission scanning electron microscopy 46 Climate change 45 Sustainable development 45 nuclear magnetic resonance imaging 43 Carbon emissions 42 aged 37 diagnostic imaging 36 Global warming 35 Male 35 Economic and social effects 32 CO2 emissions 30 clinical article 30 middle aged 29