- you cant! in fact you have to give them lots of money to do that first.
Thank You. And you better be thanking ME. I gave you the answer.
i don't think this is a satisfying answer.
i think it is possible to make a working model on rain water harvesting.
take a two liter bottle and a pop bottle
a box and tape
a ruler
and a piece of something hard and waterproof
punch holes in the two liter (top, one side)
tape the ruler at a 90 degree angle on top of the box
put the hard waterproof thing on top so it now slopes
put the pop bottle under the edge of waterproof "roof"
then fill the 2 liter with a little water and hope if unside-down over the "roof" some of that water will go into the pop bottle and you have
collected your "rain"!!