Car Free Cities

WIRED published an interesting article looking at the advantages of car-free cities for people's health and the environment. The piece touches on how the interwoven nature of identity and car ownerships puts people off car-free cities, until they are experienced.

Sand Battery

Researchers in Finland have commercialised sand battery technology that can store heat energy from excess generation. The excess electricity is used to heat air, and energy is then transferred from the air to the sand using a heat exchanger. The sand battery has been deployed in the town of Kankaanpää in western Finland and is used to power the central heating system for the district.

Urine Fertiliser

Farmers and researchers in Niger have conducted trials of urine fertiliser from 2014 to 2016 and achieved a 30% increase in pearl millet yield compared to standard fertiliser. Urine fertiliser is also a much more environmentally sustainable alternative to regular fertiliser.


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