Bacterial Biomass
There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. In all, it has been estimated that there are about five million trillion trillion, or 5 × 1030 (5 nonillion) bacteria on Earth with a total biomass equaling that of plants. Some researchers believe the total biomass of bacteria exceeds that of all plants and animals.
Read more about this topic: Biomass (ecology)