More on economic gardening: http://www.andrewalexanderprice.com/blog20130715.php#.W3sAZ5NKiRc
Podcast asking if humans could live in underwater cities: https://www.bbc.co.uk/programmes/w3cswvwz
BBC
BBC World Service - CrowdScience, Could Humans Live in Underwater Cities?
Could oceanic cities become a reality and how might they be built?
Scientists Have Developed a Way to Make Wood as Strong as Steel
https://www.sciencealert.com/new-super-wood-stronger-than-steel
https://www.sciencealert.com/new-super-wood-stronger-than-steel
ScienceAlert
Scientists Have Developed a Way to Make Wood as Strong as Steel
Scientists have developed a new type of "super wood" that is more than 10 times stronger and tougher than normal wood - and this innovation could potentially become a natural and inexpensive substitute for steel and other materials.