MotG Grows the Green

Just thinking about this :

the sun produces 3.86 x 10^26 watts
we on earth get 1.74 x 10^17 watts
big hurricanes can release 2 x 10^14 watts
all human activity for 2001 : 1.35 x 10^13 watts
three gorges dam 1.83 10^10 watts
a coal power plant 6 x 10^8 watts
a typical car engine 2.5 x 10^4 watts
person sleeping 1 x 10^2 watts ( 100 W )
big LED 1 x 10^0 watts ( 1 W )

Strange

Here is an example, one of many leaves, from one plant - Anyone want to guess what problem this is ? I think I know..