Today’s Solutions: June 21, 2026

If you frequently commute via the metro, you’ve probably noticed the hot gusts of air that tend to blow out of train tunnels. In London, a new project seeks to harness the heat from the underground metro in order to heat homes in the north of the city during the colder months of the year.

The project, which will start piping heat from the underground into homes and businesses later this year, is one of a growing number of schemes across the UK designed to warm homes using “waste heat” from factories, power plants, rivers, and disused mine shafts.

If successful, the tube project could pave the way for district heating schemes across the capital to warm homes with cheap, low carbon heat from underground lines.

This story was one of the best from 2019, and we are happy to include it in our “12 Days of Optimism” as we welcome in the new year!

Solutions News Source Print this article
More of Today's Solutions

What you need to do to make your office more sustainable

Chances are it takes quite a lot of resources to keep your office running. Think about it. The office needs lighting and heat, the ...

Read More

Fend off high blood pressure with these 6 foods

Bad news: the number of deaths from high blood pressure is on the rise in America. Good news: in many cases, dietary changes alone ...

Read More

This is how butterflies could make our future security systems unhackable

Though fingerprint recognition may make us feel like we have control over our privacy when it comes to accessing our electronic devices, much like ...

Read More

Love bees but need to relocate a hive? Here’s how to do it sustainably

BY THE OPTIMIST DAILY EDITORIAL TEAM If you are a longtime reader of The Optimist Daily, you’ll know that our team loves bees (and ...

Read More