2021-10-04T22:00:00Z	**How to Build a Low-tech Solar Panel?**
George Cove, a forgotten solar power pioneer, may have built a highly efficient photovoltaic panel 40 years before Bell Labs engineers invented silicon cells. If proven to work, his design could lead to less complex and more sustainable solar panels. ⌘ [Read more](https://solar.lowtechmagazine.com/2021/10/how-to-build-a-low-tech-solar-panel.html)
2021-05-10T22:00:00Z	**How to design a sailing ship for the 21st century?**
It is surprisingly difficult to build a carbon neutral sailing ship. This is even more the case today, because our standards for safety, health, hygiene, comfort, and convenience have changed profoundly since the Age of Sail. ⌘ [Read more](https://solar.lowtechmagazine.com/2021/05/how-to-design-a-sailing-ship-for-the-21st-century.html)
2021-03-27T23:00:00Z	**Urban Fish Ponds: Low-tech Sewage Treatment for Towns and Cities**
In the mid 20th century, whole cities’ sewage systems safely and successfully used fish to treat and purify their water. Waste-fed fish ponds are a low-tech, cheap, and sustainable alternative to deal with our own shit — and to obtain high protein food in the process. ⌘ [Read more](https://solar.lowtechmagazine.com/2021/03/urban-fish-ponds-low-tech-sewage-treatment-for-towns-and-cities.html)