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  • Solar Power Is Clean and Cheap, But Still Has Challenges to Overcome

    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.

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  • Seedballs Aiding Kenya's Reforestation Efforts

    In Kenya, like other countries in the world, deforestation is the major driver of tree cover loss. To solve this, a local startup called Seedball Kenya has developed the seedball technology whereby seeds of indigenous tree and grass species are coated with charcoal waste mixed with nutritious binders then thrown like balls into the planting grounds.

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  • Oregon Is Turning Sewage into an Endless Supply of Green Energy

    A wastewater treatment plant in Oregon not only cleans water that is released into the local river, but it also creates fertilizer that is sent to farmers to use on non-food crops and it produces renewable power from methane. The green energy created at the plant heats five buildings on the site and produces half of the energy the facility uses. This kind of co-generation system is growing in other places in the United States, China, Brazil, and Norway.

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  • Through Online Platforms, Thousands Open Their Homes to Ukraine's Refugees

    In the wake of Russia's invasion of Ukraine, online home-sharing platforms such as Host a Sister provided an avenue for thousands of people around the world to offer temporary housing to refugees leaving the country. Host a Sister in particular is geared at women looking for a safe place to stay, making it a valuable resource for families who have had to flee while men have stayed behind to fight.

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  • Online network matches inmates with services after release, similar to a dating site

    The Inside Out Network is an online service that allows people who are incarcerated to search for and connect with organizations providing re-entry support, helping them begin to create a plan before they are released. So far, at least 1,600 people incarcerated in Arizona have enrolled in the program.

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  • Distiller generates electricity from sweet potatoes

    A Japanese alcohol distiller is using sweet potatoes to generate electricity. By using as much as 1,200 tons of sweet potatoes a day, they are able to turn the vegetable and turn it into biogas. The distiller generates about 8.5 million kilowatt-hours each year, which is used to power company-owned electric vehicles.

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  • How Hong Kong protects people from dangerous landslides

    After deadly landslides in the 1970s, Hong Kong has pioneered a successful landslide risk mitigation approach. Geotechnical engineers have cataloged over 60,000 slopes and upgraded those that needed it. The most successful aspect of the mitigation approach has been an early warning system that uses a combination of data sources to determine the risk of landslides and broadcasts warnings over TV, radio, and other public sources. Deaths from landslides have dropped substantially and it has inspired similar early warning systems around the world.

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  • The urine revolution: how recycling pee could help to save the world

    Companies and research initiatives around the world are developing and testing new toilets that can collect human urine and turn it into fertilizer. These urine diversion toilets have been implemented in places like South Africa with mixed results. However, researchers in Sweden are using portable toilets to gather the urine, dry it into fertilizer pellets that are then used to grow barley for beer. This work could show how to implement these kinds of toilets on a large scale.

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  • Smart irrigation saves water, improves farming practices in Rwanda's remote drought-stricken region

    New dams in Rwanda have helped residents to update their irrigation systems, which has allowed them to increase their food production and generate more income. Sometimes, there have been disputes between farmers over the management of the water resource. But, according to one farmer, “the profit from the sale of my produce, the extra income enabled me to purchase two cows, pay school fees and medical insurance for my children.”

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  • Cleveland's reforesting efforts take root in once-redlined neighborhoods

    Activists in Cleveland, Ohio are reforesting the city's vacant lots one community garden at a time. Gwen Garth, a local activist in the city, partnered up with churches, in order to create a long-term plan to plant gardens to also increase tree canopy in the city in a more equitable approach by focusing on historically redlined neighborhoods. The plan includes reaching 30% tree canopy by 2040, which means planting 361,000 new trees.

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