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Hydrogen is one of the most important element in the universe ()it provides the building blocks from...

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They grow faster in a reactor.  They will be planted everywhere.  They are cheap to eat.  They can be a good energy source.  
When there is a lot of oxygen in the air  When there is no oxygen in the air.  When photosynthesis is taking place.  When enough starch is stored  
Plants are the real experts in producing solar energy.  Plants have been used to produce solar energy.  Plants have been using solar energy for billions of years.  Plants have been a source of solar energy.  
Because they want algae to produce sugars and starches.  Because they want green plants to become a new source of energy.  Because they want to turn plant sugars to a new form of energy.  Because they want to make photosynthesis more efficient.  
melt  get used up  go bad  liquify  
improve the efficiency of it.  turn plant sugars to a new form of energy.  make green plants a new source of energy.  get more sugars and starches from plants.  
they are grown in narrow-necked bottles.  there is enough oxygen in the air.  enough starch is stored.  there is no oxygen in the air.  
removing the sulfate slows down the hydrogen production.  It is hard to create an airfree environment.  It is expensive to remove the sulfate from the environment.  the algae’s cells work slowly if there is no oxygen in the air.  
They are easy to grow.  They can be a very good fuel source.  They are cheap to eat.  They can be used in many ways.  
Im=πI  Im=I  Ie=Im  Im=I  
They are the real experts in producing it.  They have been a source of it.  They have been used to produce it.  They have been using it for billions of years.  
compressed air and nitrogen  helium and nitrogen  oxygen and hydrogen  oxygen and acetylene  
It is not possible to remove sulfate from the environment.  It is not possible to work in an air-free environment to produce hydrogen.  It is not easy to make sugars instead of hydrogen.  It is too slow for algae to produce hydrogen when the sulfate is remove  
It is not possible to remove sulfate from the environment.  It is not possible to work in an air-free environment to produce hydrogen.  It is not easy to make sugars instead of hydrogen.  It is too slow for algae to produce hydrogen when the sulfate is removed.  
11Im1-3Im2= 5  11Im1+3Im2=5  11Im1+3Im2=-5  11Im1-3Im2=-5  

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