“…On the other hand, Chlamydomonas is also able to produce H 2 by itself, which can be improved by the presence of some bacteria, as recently reviewed by Fakhimi and collaborators [ 120 ]. These bacteria include, among others, the soil bacteria Pseudomonas putida, P. stutzeri, Rhizobium etli, E. coli [ 121 , 122 ], P. fluorescens [ 123 ], Azotobacter chroococcum [ 124 ], Mesorhizobium sangaii [ 125 ], Bradyrhizobium japonicum [ 126 ], or Methylobacterium oryzae [ 127 ]. These bacterial-cocultures can improve Chlamydomonas biomass and avoid the accumulation of inhibitory waste compounds, such as oxygen or acetate, in the medium, which in turn increases H 2 production yield [ 122 , 128 ].…”