English Iron cycle Cited by user Cassidyrenee on 20 Apr 2020 The iron cycle (Fe), also known as the Ferrous Wheel, is the biogeochemical cycle of iron through the atmosphere, hydrosphere, biosphere and lithosphere.
English Purple sulfur bacteria Cited by user Zirah36 on 19 Apr 2020 The purple sulfur bacteria (PSB) are part of a group of Proteobacteria capable of photosynthesis, collectively referred to as purple bacteria.