Fred schreef
Have any efforts been made ... to increase the efficiency of
the photosynthesis operating in the plant? I have read that photosynthesis
is in nature a very inefficient process, possibly less than 2% efficient.

Thanks
Fred.

+ + +
A first obstacle is that most improvements in efficiency in human endeavour
are driven by copying something from plants or animals.

For the reverse to work human ingenuity first would have to reach a halfway
point (where it comes up with solutions just as good as those in plants or
animals). This still seems a very long way off.
PvR