Today’s Solutions: December 17, 2025

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.

Estonia's capital, Tallinn, at sunset

What cities around the world can learn from Europe’s greenest capital

While an increasing number of major cities are striving to become more climate-friendly, one particular European capital stands out with its sustainability efforts so far. It’s no other than Estonia’s capital, Tallinn, whose notable climate measures have won it the title of the European Green Read More...

corgi in a robe and glasses yawns while relaxing in a white fluffy bed

A four day workweek? 10 reasons it’s a great idea

While enduring the global pandemic, many of us have had the chance to reassess our values and goals for our lives. This has set the scene for many companies, workplaces, and even entire countries to toy with the possibility of implementing a four-day workweek. We’ve shared several stories Read More...

MVRDV's Sun Rock with sun setting behind the horizon

This solar panel covered building reflects Taiwan’s green energy transition

Most projects designed by the Dutch architecture firm MVRDV tend to leave a lasting impression on whoever lays their eyes on them. The company's upcoming project, Sun Rock, is no exception. Designed for Taiwan’s government-owned power company Taipower, the project takes the form of a building Read More...

These sustainably powered home

These sustainably powered homes can raise families out of poverty

Finding and sharing positive ways to tackle the world’s challenges is our favorite activity at The Optimist Daily, so it’s no surprise that we are especially excited about BillionBricks and Architecture Brio’s PowerHyde solar homes, as they tackle both the global housing issue and the climate Read More...

Blonde woman scrolls through news and media on tablet while sipping coffee

Sweden combats fake news with new agency

The pandemic brought on a host of problems; however, it also gave us the opportunity to pay more attention to other issues that flew under the radar while we were busy getting through our hectic pre-pandemic schedules. One of these concerns is the dominance of misinformation or “fake news.” Read More...

produce at market in milan

This ingenious solution tackles food waste and insecurity at once

Food waste is a particularly infuriating problem because so much is wasted. According to nonprofit FoodPrint, almost 40 percent of all food in America, much of it still edible, is chucked out. All while at least a tenth of the world’s population (around 800 million people) are struggling with Read More...

Car road transformed into pedestrianised street

Berlin plans to have the world’s largest car-free urban area

In recent years, many cities around the world have become much more aware of the plight of designing our urban spaces with a car-centric mentality. In Europe in particular, cities like Amsterdam, Paris, Barcelona, and Stockholm are well ahead when it comes to reclaiming urban space from cars in Read More...

Facade of a traditional home in the German style

Rapidly retrofitting old buildings is key for climate goals - Here's how to do it

Buildings account for about 40 percent of annual global carbon emissions. In order to meet our climate goals, every building on the planet will have to be net-zero by 2050. But since most of the current buildings will still exist then, a massive number of homes will have to undergo retrofits in Read More...

Selective focus of Electric car lithium battery pack and wiring connections internal between cells on background.

Using rubber to create safer, longer lasting EV batteries

Synthetic rubbers have been widely applied for many purposes, such as in tires, sealants, and wearable electronics. A study, from the Georgia Institute of Technology in collaboration with the Korea Advanced Institute of Science and Technology, has discovered a new use for the material in electric Read More...

woman gets bottle of milk out of fridge

This market is tossing "use-by" dates to help curb food waste

The British supermarket Morrisons has decided to remove “use-by” dates on milk packaging by the end of the month in an effort to save millions of pints of milk from being needlessly thrown away each year. Instead, the supermarket is inviting their customers to use the traditional, age-old Read More...