Could maggots fed on Kenya's food waste replace wild-caught fish feed?

Brazil's small farmers can now directly supply the country's school meals programs. It's been a big boost for local farmers, and it's helping the schools too.

Fed up with living in the world's most polluted city, some residents are fighting back, on their rooftops and backyards. In 2010, India launched the Jawarharlal Nehru Solar Mission, a government program to deploy 20,000 megawatts of grid-connected solar power in the country, but much of this push for renewable energy has only been focused on rural areas, leading urban residents to take up local control of their energy supplies.

In India, many farmers, especially women farmers, have transitioned to organic farming. While it requires a serious set of skills and knowledge, organic farming increases yields and decreases costs by eliminating the need to buy pesticides. The move is both ecological and economical, and the Indian government is trying to spread the solution.

The System of Root Intensification (SRI) method resulted in dramatically high yields from one Indian village. The system centers on a "less is more" approach and results in higher yields—without the use of GMOs. The idea has faced barriers in spreading, as scientists are wary of it, even as villagers embrace the empirically successful approach.

To decrease the nation's food waste, activists in Denmark showed the people that it was safe to buy and consume items that were very recently expired. From live demonstrations where celebrity chef features expired items in the entrees to reducing prices for out-of-date items, "Danes now throw away 25 percent less food than they did five years ago."

Crop production is very high in Tanzania but the farmers have no way of storing crops so most produce goes bad. Researchers are beginning to create storage systems that allow for produce to last longer and help farmers create a greater product and income.

One program has found a way to turn feces into agricultural compost, which has helped Haiti, a country with limited sanitation systems, both keep its water clean and grow food.

Most people are unaware of how much food they waste. Food waste campaigns across the world are using creative marketing to raise awareness and encourage behavior change.

The amount of plastic debris in our oceans and water sources - especially nanoplastics that are increasingly prevalent in our food chain - is so enormous it's often beyond comprehension, and immensely difficult to address. As countries continue to industrialize and single-use products become more commonplace, the flow of harmful plastics into the environment seems insurmountable. But a number of clever inventions and dedicated individuals are working to help get plastics out of our water - and more importantly - encourage practices to reduce, reuse, and recycle.

As India's government promotes organic exports, farmers in Punjab have non-economic reasons for avoiding pesticides: Their health.