A street lit by rotten onions? An Indian market embraces biogas.

Kathmandu is one of the most polluted countries in the world--a title once caused by the excess smoke produced by brick creation in the city. However, after a 2015 earthquake destroyed much of the old technology used to fuel the brick industry, leaders took to leveraging updated technology with an increase in energy and production efficiency.

Buying local and in bulk, carrying her own containers, planning ahead and making her own food has resulted in this woman's weekly trash output being contained to a single 2.5-inch-tall Mason jar.

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.

In California’s wildfire-prone Sierras, forest managers are turning to an ancient, if not quite intuitive, tool: more fire. In 2019, the Forest Service will manage 250,000 acres with controlled burns and “mechanical thinning,” using equipment to take out small trees. Though such plans face some hurdles, states across the country are adopting them, reducing wildfire severity while often benefiting ecosystems.

Official in Bangkok, Thailand unleashed a small fleet of drones to deal with the hazardous levels of air pollution plaguing the city. The drones were outfitted with canisters capable of spraying water and a "non-hazardous chemical spray." The pilot project successfully reduced air pollution by small amounts.

Two organizations in Pakistan are working to tackle the country’s waste problem. Saaf Suthra Sheher in Islamabad set up partnerships with offices and schools to process their dry waste like plastics and glass. TrashIt, a Karachi-based group, collects organic waste from vegetable sellers and restaurants and then processes and sells it as compost. Although the two organizations can only process so much of the waste produced in cities, they argue that until an effective municipal waste collection system is implemented, they can educate individuals and businesses about how to recycle properly.

After being known as a polluted mining town, politicians, scientists, industry officials, and residents of Sudbury, Ontario, were able to come together to restore its land. After 40 years and $33.5 million, they are about halfway through recovering about 200,000 acres of land. So far, they’ve been successful at restoring air quality, neutralizing soil to allow for replanting, and restocking lakes with fish. While some locals think the mining companies should have done more, the collaborative spirit could be a model for other communities looking to improve the environment.

Luxury hotels collect and reuse food waste. The hotels audit their waste, then useful ways to give it new life—as compost, animal feed, or even biogas.

The voluntary carbon market allows small-scale landowners to receive credits for reducing climate-changing emissions, which they can sell to corporations to offset their emissions. The carbon market has provided small landowners with other options to make money besides logging.

London charges higher-emission vehicles every day they enter the city center, called the Ultra Low Emission Zone, on top of the already existing London Congestion Charge for non-electric vehicles to enter the zone. Since the charges were implemented, the city has seen an increase in electric vehicle adoption and improved air quality.