they have to look to the cannabis farmers whou make their own irrigation systems!!!
history of gravity and water harvesting can't be wrong!
the crops of the aztecs/myans/mexicans!
the hanging gardens of babylon.
the dutch canals!
but if its beer,you need govt. money to make your product!!!
there are actually water retaining polymer 'beads' you can buy that store up to 100% of their wieght in water,and slowly release when their
surroundings dictate it!
its funny because they use a 'plastic' for this product,but it can be made eco-friendly out of hemp!!!
win win no?
the only by product of an empty beer bottle is a 10 cent deposit,or something to pee in when your too loaded to get to the washroom in time!!!
just a thought,and by the way,i enjoy my beer!