One thing you can do is make plastic.
http://www.nrel.gov/news/press/2012/1996.html
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News Release NR-3512
[font size=5]NREL Produces Ethylene via Photosynthesis[/font]
[font size=4]Environmentally-friendly process offers intriguing alternative to fossil-fuel based ethylene for chemicals and transportation fuels[/font]
September 25, 2012
[font size=3]Scientists at the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) have demonstrated a better way to use photosynthesis to produce ethylene, a breakthrough that could change the way materials, chemicals, and transportation fuels are made, and help clean the air.
NREL scientists introduced a gene into a cyanobacterium and demonstrated that the organism remained stable through at least four generations, producing ethylene gas that could be easily captured.
Research results were published in the journal Energy & Environmental Science.
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Ethylene is the most widely produced petrochemical feedstock in the world. But currently it is produced only from fossil fuels, and its production is the industry’s largest emitter of carbon dioxide. Steam cracking of long-chain hydrocarbons from petroleum produces 1.5 to 3 tons of carbon dioxide for every ton of ethylene produced.
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The ethylene would be produced in an enclosed photobioreactor containing seawater enriched with nitrogen and phosphorous. The ethylene gas would rise and be captured from the reactor’s head space. It could then undergo further processing, including a catalytic polymer process to produce fuels and chemicals. The continuous production system improves the energy conversion efficiency and reduces the operational cost.
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Polyethylenes of various types consume more than half of world ethylene supply. Polyethylene, also called polythene, is the world's most widely-used plastic, …[/font][/font]
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