The world faces many problems: disease, hunger, global warming. The solution to many of these challenges depends on science.
This idea is at the center of a photo competition, now in its third year, held by London's Society of Biology called "How Biology Can Save The World."
The pictures either depict pressing environmental issues, such as the decline of bee populations, or represent innovative solutions, such as using algae to make biofuel.
Five hundred entries have now been whittled down to a short list of 12.
The winner will be announced in October and receive a prize of $1,300.
Preventing the spread of avian flu by spraying disinfectant on birds, chickens and ducks. The photo was taken at a poultry market in Northern Sumatra, Indonesia, where 156 people have died from the disease since 2005.
This research facility in the Philippines uses a system that recycles water to grow shrimp. The method will revolutionize seafood production, in turn, helping to solve global hunger.
This photo illustrates the beneficial properties of lichen, a combination of fungus and algae that sucks up pollutants in the air, thereby acting as a natural air quality monitor.
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