There is a new science in town and its known as Biomimicry. It is the science of emulating nature to create human technology that is cost effective and in tune with leaving mutualistically with the rest of the living organisms on earth. Humans are the biggest consumers on earth and to add insult to injury we are wasteful. To minimize our impact on earth some scientist/technologist have taken it upon themselves to study nature and model solutions to human problems from these studies.
Nature is very resourceful and never wasteful. Take for example the lotus never gets dirty even though it grows in swampy areas. Why is that? Most people think its because it is smooth but in reality the lotus leaves have bumps on them that resemble a mountainscape. Therefore when dirt particle rests on the leaves they teether on these bumps, and when it rains the drops of water are able to cart them off the leaves as a rolling snow balls would pick up leaves. Thusly paints companies are trying to mimic this effect and some have accomplished them.
So next time you are outside, study nature. You might just find the solution to drought or famine in the microscopic/macroscopic world of mother nature.