Public transit was free for many Coloradans in August. When fares returned, many riders stayed, data shows.

Austria rolled out the KlimaTicket, an annual pass that gives the holder access to all forms of public transportation in the country, to encourage increased use of public transport with an eye toward climate change mitigation. The uptake has exceeded expectations with 134,000 tickets sold within just the first two months, but it's still unclear what effect the program will have on the country's carbon emissions.

Copenhagen is a highly livable city, thanks to policies that focus on making streets safe and convenient to walk. The bigger the city, the worse it is to design urban spaces only with cars in mind, says planner and architect Jan Gehl. His top advice is to gather data about people and their movements, making pedestrians as visible in city planning as automobile traffic.

Radar, lidar, and sensors guide the world’s first autonomous tram across Potsdam. While not yet commercially viable, the tram is an advancement in driverless technology. It can respond to road hazards faster than a human and runs on energy from wind and solar.

To help essential workers navigate the notorious traffic of Bogota, the city built over 50 miles of an emergency bike network. The plan was in place before the arrival of coronavirus but the execution was sped up to meet the demands of increased bike usage. Other measures were also put into place to make the roads more bike and pedestrian-friendly: Reduced speed limits for cars, a 20 percent increase in private parking for bikes, and a bike registration system to deincentivize bike theft. Efforts to expand bike lanes not only eased traffic, they also helped relieve pressure on the overcrowded bus system.

An initiative on the Moscow metro system has posters on the train featuring cats and dogs that are looking for a home. Known as the “Tails and Paws” train, these animals come from 13 animal shelters in the city and riders can use their phone to scan the poster to learn more about the animals up for adoption. “It’s about forming a new culture of responsible attitude to animals,” says one of the workers at a shelter.

After years of drought and land-clearing that left Niger with few trees left, the country now boasts about 200 million trees, which have mostly been reestablished naturally. While the effects of climate change could threaten the future of these trees, this method has also increased crop yields in villages. This model of letting trees grow back with little human influence could be implemented in other countries.

Scientists are testing if adding alkaline substances to seawater can allow oceans to absorb more carbon dioxide emissions. Early tests suggest this could be a potential way to combat climate change, but there are still many questions about how this can scale, how it impacts the natural ecosystem, and if it’s cost effective to implement.

Beavers and the dams they build have been found to be tools against climate change as the planet’s temperature continues to rise. Dams slow water down and allow it to seep into the Earth, providing groundwater for humans, and also cools down both water and air temperatures. Beaver dams also create wetland ecosystems that are practically resistant to wildfires.

The Kansas City Streetcar provides fare-free transportation for residents, which helps to get them downtown and promote more economic development. The fare-free streetcar also makes transit more equitable by removing barriers for low-income passengers and improving mobility for people with disabilities.

New Jersey schools are working to make climate education widespread by implementing general education standards that include climate change education in every grade and subject. These new education standards have been inspiring students to brainstorm solutions to climate-related issues like reducing food waste and increasing coastal resiliency. The state has also earmarked $5 million to help local teachers attend professional development sessions to teach them how to create new climate change-focused lesson plans.