#water

Barrels were logged only approximately when dumped. Their exact positions on a 14,500 km² abyssal plain, their present state of corrosion, and which have already breached and spilled are largely unknown — you cannot manage or monitor what you cannot find.

Evaporative cooling consumes water as its core mechanism (~56 L/day above 30 °C per bloc° unit, against ~24 L/day harvested), and the climates where it works best are typically the most water-stressed — putting public cooling in direct competition with drinking-water supply durin

Solar evaporation yields ~10 L/m²/day outdoors—near the physical ceiling, not an engineering gap. Full domestic use (~50–100 L/person/day) requires 5–10 m² per person; a 10,000-person town needs 5–10 hectares. This bounds the technology to household/hamlet scale, not municipal su

Conventional desalination discharges 58–78% of inlet water as hypersaline brine that raises local salinity and depresses dissolved oxygen, damaging the inshore marine ecosystems coastal fishing communities depend on for food and income.

The dominant failure mode of decentralized water infrastructure is not installation — it's what happens in year two and beyond. ~58% of handpumps in sub-Saharan Africa are non-functional at any time, representing $1.2–1.5B in stranded investment over two decades.

Coastal, island, and remote communities sit beside seawater but lack safe drinking water. Conventional desalination (RO, thermal) requires reliable power, capital, trained technicians, and supply chains they don't have — and discharges brine that harms local ecosystems.

Where coastal advection fog is dependable, vertical mesh nets passively strain water droplets from wind-driven fog into reservoirs — no energy, no membranes, no seawater intake. Cheap and low-tech, but geographically constrained and historically prone to social/ownership collapse

A femtosecond-laser-textured aluminium panel wicks seawater uphill across its face, absorbs ~92% of sunlight to evaporate it, and uses the coffee-ring effect plus salt creeping to push crystallised salt to the panel edges — self-cleaning, no membranes, no chemicals, no electricit

Replace volunteer committees with a professional maintenance company on a performance contract: hotline, guaranteed repair times (~3 days), preventive maintenance, and a stocked parts supply chain — funded by pooled mobile-money subscriptions and results-based payments tied to up

Large-mesh fog collectors installed on El Tofo mountain piped water to the coastal village of Chungungo, averaging ~15,000 L/day at peak. The system ran from 1992 to ~2002 before total abandonment: no local maintenance…

A women-led NGO (Dar Si Hmad) built the world's largest operational fog-water harvesting system on the fog-rich slopes of Mount Boutmezguida, on the edge of the Sahara, where groundwater is failing under drought. Vertic…

Laboratory and rooftop proof-of-concept of the femtosecond-laser-textured superwicking black aluminium interfacial crystallizer (ABF-STIC) using real ocean water from the Atlantic, Pacific, and Indian Oceans. A 7-day co…

PlayPumps International installed merry-go-round handpumps intended to lift groundwater as children played, with maintenance funded by advertising revenue on storage-tank billboards. Backed by approximately $60M from th…

A professional maintenance company on performance contracts replaced volunteer community management across two Kenyan counties. Communities call a hotline; "smart handpump" sensors (accelerometer + GSM) flag failures re…