Green Era's food waste processor creates compost and renewable energy in Auburn Gresham

According to the United Nations, approximately 1.3 billion tons of food is wasted every year, which is costly to the environment and the economy. In Seoul, technological waste bins calculate the weight of the garbage against a set limit, and if the disposal is too heavy there is a fee. To reduce landfill deposits, Seoul has also composted food waste by turning it into animal feed, fertilizer, and electricity generation.

The University of Notre Dame installed three Grind2Energy systems, which aims to reduce the amount of food waste from the campus’ dining halls. The systems process the waste and send it to a local dairy farm where they break down the material to produce biogas that is used to generate electrical power for 1,000 homes each day in Plymouth, Indiana. While not everyone at the university has committed to the sustainability efforts, these systems can be scaled to be used on other college campuses.

In South Korea, a combination of grassroots movements and government campaigns have dramatically reduced the country's food waste by 95% (about 400 metric tons a day). Residents are required to buy special biodegradable bags, which serves as a tax that finances 60% of the city's food processing. It's a pay-as-you-waste tactic that also prompts citizens to find creative ways to recycle and compost, and special weighing machines encourage them to extract the moisture first, saving even more money on collection costs.

The electricity powering 3,000 Perth homes might have started out as moldy bread and rotting lettuce. The city of Cockburn collects food waste from supermarkets and restaurants to be fed into a mechanical "stomach" that converts the waste to energy. Methane is trapped and used to power electric generators. The remainder of the "digested" food is turned into compost and liquid fertilizer. The operation has recycled 43 tons so far, removing 81,000 kilograms of gases that otherwise would escape landfills and warm the atmosphere.

Pepperdine University is having some trouble as they try to go about achieving the goal set by the California government stating that 75% of waste must be diverted by 2050. This article covers the specifics of the conservation efforts at Pepperdine, and also looks at more successful programs going on at UCLA and Santa Clara University. Some effective tactics include a comprehensive education plan on recycling, requiring faculty and staff to dispose of landfill waste themselves by only collecting recyclable waste, and partnering with athletic teams to champion conservation.

Solar energy is a clean, cheap, renewable, and land-efficient resource, making it a valuable technology to scale up in the face of climate concerns and clean energy. Diversifying the supply chain for creating and sourcing solar panels can help make solar energy more reliable when faced with geopolitical and human rights issues.

Hywind Scotland is the world's first commercial wind farm using floating wind turbines to generate power for about 36,000 homes a year. This approach — which is being seriously looked at by several countries seeking to reduce their carbon emissions and oil-and-gas companies wanting to expand into renewable energy — allows wind farms to work in deeper waters where there is often stronger winds.

To preserve the millions of trees that are cut down just to produce coal in Burkina Faso, a Burkinese engineer created "green charcoal that would not only protect forests but also help fight against the proliferation of garbage." This ecological fuel is made from carbonized collected garbage and coconut husks, which in turn has reduced the amount of garbage that has to be managed by the authorities in charge of sanitation.

The town of Athens, Georgia has committed to a 100% renewable energy pledge. Both the local government and local businesses are working towards it by implementing sustainable practices such as solar panels and wastewater pretreatment systems.

The Blue Lake Rancheria Tribe in California installed its own small-scale electrical supply grid using solar panels and Tesla batteries to make their community more resilient to energy disruptions and lower carbon dioxide emissions. This proved useful during the 2019 wildfire season when utility companies shut down power for millions of residents. The tribe is now helping other Native reserves to build their own microgrid systems.