Related by context. Frequent words. (Click for all words.) 61 reactive oxygen species ROS 59 atmospheric methane 58 species extinctions 58 atmospheric carbon dioxide 57 atmospheric CO2 57 atmospheric nitrogen 57 ocean acidity 56 planktonic 56 atmospheric CO 56 co2 55 isoprene 55 carbon dioxide CO2 55 bioaccumulation 55 carbonic acid 54 Phytoplankton 54 absorbing carbon dioxide 54 carbon dioxide 54 greenhouse gases GHGs 53 anthropogenic 53 terrestrial ecosystems 53 N2O 53 aerosol particles 53 CO ² 53 biota 53 CO2 53 sulphates 53 Nitrogen oxides 53 acidification 53 greenhouse gases GHG 53 hydrogen ions 53 radiative 52 nitrogen fixation 52 bile acid 52 methanogens 52 phytoplankton 52 CO2 concentrations 52 Gamma rays 52 CO -2 52 superoxide 51 endocrine disruption 51 osmium 51 radiative forcing 51 efflux 51 greenhouse gasses 51 Co2 51 myoglobin 51 Melting glaciers 51 diatoms 51 nitrogen 51 prokaryotes 51 biosphere 51 acidifying 51 asparagine 50 naturally occurring 50 biogenic 50 bile acids 50 carbon sinks 50 reactive oxygen species 50 hydrological cycle 50 nitrous oxides 50 sulphate 50 heat trapping carbon dioxide 50 methane 50 endocrine disruptor 50 nutrient loading 50 greenhouse warming 50 μM 49 Carbon Dioxide 49 marine sediments 49 greenhouse gases 49 water vapor 49 freshwater ecosystems 49 rotting vegetation 49 Oxidative stress 49 potent neurotoxin 49 nitrous oxide emissions 49 deplete oxygen 49 sulfate 49 microscopic algae 49 Carbon dioxide 49 Bt toxin 49 methylmercury 49 gut microbes 49 nutrient runoff 49 diatom 48 Greenhouse gases 48 seagrasses 48 organisms 48 salinity 48 oestrogens 48 stratospheric ozone 48 nitric oxide NO 48 Ocean acidification 48 polycyclic aromatic hydrocarbons PAHs 48 Aerosols 48 Ca2 + 48 pathogenic organisms 48 trophic 48 Soil erosion 48 fatty tissues 48 acrolein