Sustainable Urban Development
With cities expected to host about 70 percent of the world's population, sustainable urban development is key to making communities worldwide more resilient against the growing threat of climate change. Find out about the latest urban practices from across the world aiming to make our cities more sustainable and inclusive in these good-news stories from The Optimist Daily.
Ethiopia's Green Legacy Initiative is turning citizens into foresters
BY THE OPTIMIST DAILY EDITORIAL TEAM For most of the past century, Ethiopia was losing its forests. From the turn of the millennium to 2025, the country shed 560,000 hectares, about 2,160 square miles, of tree cover to agriculture, logging, and charcoal fuel. Then the government launched the Read More...
From 2.6% to 97%: how South Korea eliminated food waste and what NYC can learn
BY THE OPTIMIST DAILY EDITORIAL TEAM In Yeouido, Seoul, Seunghwan Hong spends less than a minute dropping off his food scraps. He taps a card, the lid opens, and the bin logs the weight. Whatever he throws in, he pays for. South Korea's food waste recycling rate was 2.6 percent in 1996. In Read More...
Berlin's REWE supermarket: the grocery store with a working rooftop farm
BY THE OPTIMIST DAILY EDITORIAL TEAM The lettuce in REWE's Lankwitz store in Berlin has had a short morning. Grown on the rooftop farm directly above, cut, packaged by hand, and carried downstairs before most shoppers walk in, the whole trip from farm to shelf is measured not in miles but in Read More...
Elementic's MO6 is the building material claiming to lock away carbon for thousands of years
BY THE OPTIMIST DAILY EDITORIAL TEAM Lignin is the part of wood that paper mills and timber companies tend to get rid of. It comes off as a byproduct when wood is processed, resists most conventional uses, and usually ends up burned for energy. A Finnish materials startup called Elementic Read More...
Climate attribution science just changed the rules for fossil fuel lawsuits
BY THE OPTIMIST DAILY EDITORIAL TEAM Scientists can now draw a straight line from a single oil company's emissions to a specific disaster. Not a rough estimate of the industry's overall contribution, but a specific company, a specific event, a specific percentage. That's what a new Read More...
London's clean-air zone is linked to faster lung growth in children, a new study finds
BY THE OPTIMIST DAILY EDITORIAL TEAM For years, researchers knew that air pollution stunts lung development in children. What they hadn't been able to show was whether cleaning up the air could actually change that trajectory. A study published in The Lancet Public Health suggests it can. Read More...
The world hit 3 terawatts of solar power faster than anyone predicted
BY THE OPTIMIST DAILY EDITORIAL TEAM The first terawatt of global solar capacity took nearly 68 years to reach. The second arrived in roughly two years. The third came in 19 months. The world crossed the 3-terawatt mark in early 2026, and the pace is still picking up. In 2025 alone, the world Read More...
Rooftop rainwater could break cities' air conditioning trap
BY THE OPTIMIST DAILY EDITORIAL TEAM Air conditioning is making cities hotter, and that's not incidental. It's the physics. Every AC unit pulls heat from inside a building and dumps it into the street, which raises outdoor temperatures, which makes more people reach for the thermostat. Read More...
India connects 124 million rural homes to tap water
BY THE OPTIMIST DAILY EDITORIAL TEAM Six years ago, fewer than one in six rural homes in India had a tap water connection. As of mid-July, more than four in five do, and the difference adds up to 124 million additional households. Minister V. Somanna confirmed the numbers in a written reply Read More...
What India’s hydrogen train launch means for its vast railway network
BY THE OPTIMIST DAILY EDITORIAL TEAM India launched its first hydrogen-powered train earlier this month. It was built domestically and is now operating in Haryana. Two hydrogen-powered driving cars, eight passenger coaches, a capacity of about 2,600 passengers, and a top speed of 47 mph (75 Read More...