Hydrogen gas is a promising alternative to petroleum-based fuels. Hydrogen can be oxidized in fuel cells to generate an electric current with water as the only waste product. While most hydrogen is derived from fossil fuels, it can also be produced biologically using sustainable, renewable resources. Purple non-sulfur bacteria, like Rhodopseudomonas palustris, can naturally produce hydrogen during photosynthetic growth. These purple bacteria use a different kind of photosynthesis from plants, algae, and cyanobacteria, which obtain energy from light, electrons from water, and carbon from CO2 to grow and divide. Purple non-sulfur bacteria obtain energy from light, but they do not… Login to continue

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