Carbon Nanostructured materials 25 Nanotubes 22 Isotopes 20 Nuclear magnetic resonance spectroscopy 14 Environmental aspects 13 Tubes 12 more ... Spectra 10 Plants 9 Congresses 6 Metabolism 5 Research 5 Nitrogen 4 Carbon content 3 Carbon cycle (Biogeochemistry) 3 Carbon dioxide mitigation 3 Carbon fibers 3 Carbon, Activated 3 Case studies 3 Effect of atmospheric carbon dioxide on 3 Electrodes 3 Global environmental change 3 Measurement 3 Synthesis 3 Absorption and adsorption 2 Adsorption 2 Analysis 2 Carbon dioxide 2 Carbon sequestration 2 Catalysts 2 less ...