30.0 MB (1.2 MB compressed)
4011 x 2612 pixels
34.0 x 22.1 cm ⏐ 13.4 x 8.7 in (300dpi)
NREL / US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY NREL / US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY
Algae grown for biofuel, light micrograph. Algae are photosynthesising micro-organisms that can convert carbon dioxide into large amounts of lipids. The lipids can be converted into biodiesel by reacting with alcohol, a process known as transesterification. Unlike fossil fuels, biodiesel is biodegradable and non-toxic. However it is more costly to produce. Algae can also be cultivated to produce pharmaceutical products, dyes and edible oils, or dried and used as fertiliser or burned as biomass.
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