San Diego's Organic Waste Recycling program shows progress after first full year

Looking at what recycled phosphorus could do for corn in the United States, the country’s number one crop, a study found that we’d need just 37 percent of available recyclable domestic phosphorus to fertilize all of the corn in the country.

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.

A robust population of grizzly bears can be an indicator of healthy land; however, the bears also can destroy grain bins, consume vegetation, and kill livestock. Ranchers work with the Canadian government and local conservation groups to protect their resources with bear-proof grain bins and electric fences.

When cattle die on ranches in Montana, they can attract grizzly bears that can come dangerously close landowners, ranches, and living livestock. Blackfoot Challenge, a coalition of ranchers and landowners who work with the government, collects and composts dead cattle into odorless woodchips. These woodchips are effective at repurposing carcasses into high-way side revegetation projects.

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 From live demonstrations where celebrity chef features expired items in the entrees to reducing prices for out-of-date items, "Danes now throw away 25 percent less food than they did five years ago."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.

Researchers figure that roughly a third of all the food we produce is never eaten. In Paris, a new restaurant is taking a small slice out of all that waste by salvaging discarded food from a local market, cooking it up into fine cuisine, and serving it on a "pay-what-you-can" basis to a clientele that includes some of the city's neediest residents.

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.

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.

Billions of people around the world lack access to safe sanitation, causing disease and deaths. In Ecuador a foundation developed a cheap, dry, composting toilet for poor rural families.