I believe the answer is nitrogen. http://chemistry.about.com/od/geochemistry/ss/nitrogencycle.htm
No. Plants cannot use elemental nitrogen. The nitrogen must first be fixed, either by lightning or by nitrogen-fixing bacteria. Some plants have such bacteria in their roots.
The ozone layer is not fixed. It must be fixed.
OK well free nitrogen is fixed by bacteria that live in the soil. some bacteria live in nodules, or bumps , on certain plant roots. the bacteria get food from the plants, and plants absorb fixed nitrogen from the bacteria. animals get nitrogen by eating plants or by eating prey that have eaten plants. fixed nitrogen may enter the soil in other ways too. a small amount of free nitrogen in the air by lighting. it is carried to the ground by rainfall. fixed nitrogen also enters the soil because of decomposers. decomposers break down dead organisms, and fixed nitrogen is released in the soil. the fixed nitrogen can be absorbed by plant roots.
To kill bacteria.
Nitrogen is the most common one.
bacteria and lighntning
I believe the answer is nitrogen. http://chemistry.about.com/od/geochemistry/ss/nitrogencycle.htm
Bacteria
No. Plants cannot use elemental nitrogen. The nitrogen must first be fixed, either by lightning or by nitrogen-fixing bacteria. Some plants have such bacteria in their roots.
To your elements CSS add:position: fixed;
bacteria and lightning
The ozone layer is not fixed. It must be fixed.
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Bacteria and Lighting
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Bacteria