Double Dipping Allowed! Turbines & Salsa!

alright so here's my question, why can we not double dip when it comes to energy creation?

everywhere we look there is energy being spent, energy being spent is potential for energy to be harvested...

for instance...

-rain falling, put some mini-turbines in your gutters, the whole way down
-water down the drain put a turbine
-micro turbines on planes to power passenger electronics
-they are starting to do this with elevators, capturing energy on the way down and heat recovery systems
-anywhere with movement, capture it, sure its on the micro scale and laws of energy say we can't create a perfect machine where we capture more than we spend but it has to help and maybe we can damn near close to 100% recovery

my latest idea, design a car with wind scoops on the roof, why not recapture some of the spent energy to make the car move and use it to say recharge the hybrid batteries partially. lets get some badass drawings of integrating turbines into a car design.