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Zero Mass isn’t going to rival bulk water processors any time soon. It will initially only be able to produce up to 2.3 million litres annually - about the volume of a typical Olympic swimming pool. The technology is still much more expensive than desalination for the same output of water. So Zero Mass’s will be in the same bracket as imported, high-end brands such as Evian and Fiji

The rectangular boxes - measuring around 2.4 meters (8 feet) by 1.2 meters - absorb water vapour and extract it using solar energy. Although they can operate almost anywhere the sun shines, Dubai’s hot and humid climate makes the emirate a prime location, according to Cody Friesen, founder of Zero Mass

The panels have dust filters and use a chemical compound that only captures water molecules, ensuring the water is purified even when the air is polluted.

Gulf nations want to reduce their heavy dependence on food imports, especially with the coronavirus pandemic disrupting global supply chains. This month the UAE imported 4,500 dairy cows from Uruguay to boost milk production. It’s also trying to farm rice locally, the success of which will largely depend on using sustainable amounts of water.

Water-from-air is only suitable for farming in enclosed environments such as warehouses

“With hydroponics, it’s a huge advantage to be using very pure water to begin with,” said Wahlgren. “If you’re using desalinated water, there’s still quite a large salt component, which can be harmful to the plants.”

The country's irregular rainfall patterns are accentuated by climate change, with periods of droughts and record high temperatures oscillating between torrential rain and floods, according to the agriculture ministry.

latest government figures also reveal that poor infrastructure means in some regions about half of water is lost before it even reaches the tap

It is mostly women who carry the burden of fetching water

"It costs a lot of money and there is still (more) water lost through the network (than desalination stations are projected to produce)."

"We need a lot of water during Eid - for cooking, showering, for washing the intestines of the sheep," she said, referring to the traditional method for preparing meat during the holiday. "The infrastructure is bad, we lose water in the distribution network. The summer months are peak tourist season, so there is a lot of water consumption," said Louati of the OTE. "And because of climate change, the availability of water varies more than before."

Even for houses on the grid, water is not guaranteed. Nomad08 recorded 3,000 cuts between 2016 and 2018 across the country, lasting up to 60 days at a time.

Tunisia's new Water Code, which was approved by ministers in September and is waiting to be debated by parliament, includes climate change as a factor to be considered in water policy decisions, unlike the original 1975 code.

In addition to repairing the water network, Aini told the Thomson Reuters Foundation that the government's 2050 strategy for water will involve desalination projects powered by renewable energy.

In 2017, the minister of agriculture created a committee dedicated to prioritising climate change in the management of agriculture and water. "We are in front of a fait accompli - we need to do with what we have and it is only going to become less (water)," said Rafik Aini, coordinator of the committee and senior negotiator in climate change at the agriculture ministry.

In January, a study by the U.N. University Institute for Water, Environment and Health (UNU-INWEH) warned that the global levels of surplus salty brine produced by this method were 50% higher than previous estimates.

Desalination would also have "profound impacts" on the sea ecosystem, where this waste is mostly dumped, the report found.

the "politics of agriculture needs to change," said Gafrej. "With precious and rare water, we do not have the right to produce certain cultures like watermelons."

about 80% of Tunisia's natural water resources are used for agriculture, according to last year's government figures. Thirsty crops like oranges, watermelons and tomatoes are grown for export abroad, mostly to Europe.

In intensive farming regions, like Kairouan, groundwater is being extracted at a faster rate than the underground supply is renewed, as well as from non-renewable groundwater sources. A government report noted that these resources are exploited up to 400% in certain regions.

The Nile Delta—where agriculture employs one-fifth of the country’s workforce and is responsible for 12% of its GDP and much of its food supply—is being hammered by rising sea levels, rising temperatures, and a growing shortage of water.

rapid urbanization and population growth

Climate adaptation solutions that could keep environmental problems from turning existential—fixing the battered and wasteful irrigation network, expanding affordable access to improved seeds and climate-smart farming technologies, and more effective and equitable regulation of urban development on agricultural land—are being rolled out by the government and research groups, but often slower than the pace of climate impacts. That’s left Egypt’s economy and food security exposed to growing risk.

“We’re really squeezed and marginalized here, and the government isn’t helping,” said one farmer down the road from Abdullah, who requested anonymity to speak frankly (with tens of thousands of political prisoners, Egypt’s restrictions on free speech are also gaining prominence ahead of COP27).

his children see no future in agriculture

Around 1805, an Ottoman general named Muhammad Ali took control of the country, and founded the dynasty of kings that would rule—eventually under British colonial supervision—for 150 years. One of Ali’s most enduring marks on the country was the establishment of the first modern network of dams and irrigation canals in the Delta, which allowed tens of thousands of new acres to come under cultivation.

water and land played a crucial role in Nasser’s legacy. 12% of the country’s arable land was owned by the aristocracy; Nasser nationalized this land and distributed it to about 340,000 impoverished rural families. He also further extended Ali’s irrigation network and oversaw construction of the Aswan High Dam, which brought an end to the Nile’s ancient seasonal flooding and fixed the river in its present position, with just two remaining branches forking through the Delta.

Egypt’s population has since more than quadrupled, to 104 million. Yet the flow of the Nile, which supplies more than 95% of the country’s water, has remained more or less constant. In the 1990s water availability fell below the international “water poverty” benchmark of 1,000 cubic meters per person per year.

Egypt has managed that scarcity by meticulously recycling agricultural water and, in recent years, curtailing the production of water-intensive crops like cotton and rice and importing 40% of its wheat and other food staples.

The population is still growing quickly, and could reach 160 million by 2050. The Grand Ethiopian Renaissance Dam that is nearing completion upstream could cut the flow of Nile water into Egypt by a quarter during the as-yet-unknown number of years it will take to fill its reservoir. By 2100, climate change-related heat waves upstream could reduce the Nile’s flow by 75%, Abousabaa said.

current annual demand for water is about 35% higher than what the country receives from the Nile, groundwater, and a very small amount of rain—a deficit of about 20 billion cubic meters. To cover it, she said, Egypt will need to use every drop multiple times, aggressively minimize wastage, and boost the supply by investing $2.8 billion in dozens of new desalination plants with the aim to produce 5 billion cubic meters annually by 2050.

Egypt has made clear that COP27 will focus primarily on wringing climate finance out of the rich countries that are most responsible for climate change.

On the western fringe of the Delta, farms and suburbs are gradually overtaking the desert as the central Delta grows more crowded. Here, water is even scarcer and the impacts of climate change are more pronounced. But in this and a few other desert areas around Egypt, the government is working to link more than 1.5 million acres to groundwater irrigation, and says it is about one-third of the way there. Land reclamation could take some pressure off the Delta, and sandy soils are well-suited for the production of citrus fruits that are one of Egypt’s most lucrative exports.

The unpredictability makes it difficult to identify solutions, Salah says: “Climate change is like a big black box.”

“For the last two years, with heat wave after heat wave, we lost more than half the crop. It’s really sad.”

The farm relies on groundwater brought up from wells on the property, and Nasrallah says the suburbs are draining the aquifer. In the last four years he has had to dig an extra thirty meters to find water—and deeper wells mean higher electricity bills for pumping. Some wells have dried up altogether. Recently, government officials told him he had to stop watering the grass on a soccer field he built for his workers.

Urbanization is also spreading in the inner Delta, as many farmers decide that constructing housing is more profitable than growing crops. Since the 1970s, about 14% of the Delta’s arable land has been converted to urban development

Individual farms are also becoming smaller with each generation as, in keeping with longstanding Egyptian custom, land is divided among a father’s heirs (with sons traditionally taking a larger share than daughters). Urban development degrades the Delta’s soil and drives more farming into the desert, leaving the entire food system more vulnerable to climate impacts. Land fragmentation leads to the inefficient use of water and other resources and raises the costs of distribution for farmers.

in some cases, the government’s own plans are responsible, most recently in August when thousands of people living on a Nile island near Cairo that was primarily used for farming were evicted to make way for a state-sanctioned development project.

The network started by Muhammed Ali now includes about 33,000 miles of delivery and drainage canals across the country, enough to wrap around the globe, that range in size from small rivers to something a child could hop over. Delta residents say they used to bathe in these canals, drink from them, and raise fish in them. Now many of them, especially at the ends of the network, are polluted with farming chemicals and sewage, and choked with trash.

Between seepage, evaporation, and water wasted by farmers who flood their fields instead of using controlled irrigation hoses, nearly one-third of the country’s water is lost in the irrigation system between the Aswan High Dam and the sea

The soil is dark and appears rich, but is crusted with a visible layer of salt, a problem that affects up to 40% of Egypt’s arable soil.

Fixing the irrigation network is a priority for the government. Eman Sayed from the Irrigation Ministry said her agency has lined about 3,700 miles of canals with concrete in the last two years and is aiming to finish another 12,400 in the next few years. The ministry is also helping farmers cover the cost of installing drip irrigation systems, which researchers at AUC found can cut farmers’ water consumption 61% per year; today such systems cover only one-sixth of arable land in Egypt.

Authorities have also begun to restrict production of water-intensive crops like rice and bananas, although farmers say there is little enforcement of these rules, and both crops are still widely cultivated throughout the Delta.

rising temperatures and falling rainfall mean crops—which consume 86% of Egypt’s water supply—will require more irrigation to survive.

On the horizon, an offshore natural gas platform is visible. Egypt, which seized the disruption of Russian energy supplies to Europe because of the Ukraine war as an opening to boost its own exports of natural gas, is now contributing more to the problem than ever before; an independent review of its new climate strategy ranked it “highly insufficient” for averting disastrous levels of carbon emissions.

By 2100, Noureldeen says, sea level rise could inundate nearly 700 square miles of the coastal Delta and displace four million people.

the regime, striving to gain self-sufficiency in its conflict with the West, encouraged farmers to plant more wheat and other grains without paying attention to the water intensity of cereals and the increasingly dire state of the aquifers. This led to farmers digging tens of thousands of wells, many illegally without any supervision or accountability. In the 40 years since the revolution, the number of wells in Iran has climbed from 60,000 to almost 800,000

Aquifers that haven’t been recharged are starting to collapse and subside permanently (an effect that has been evident in areas of the United States such as Fresno, California)

Politicians including Khatami and former President Ali Akbar Hashemi Rafsanjani diverted water from the Zayandeh for political purposes. Khatami was particularly instrumental in the river’s destruction by diverting water to his home province of Yazd. Rouhani has in turn completely neglected Iran’s water crisis and has chosen not to pursue policies that could alleviate water shortages, including aquifer management, construction of water recycling plants, and public campaigns encouraging Iranians to lower their consumption rate. Instead, he has pushed to transfer desalinated water to his home province of Semnan and build more dams. His government has dealt with protesting farmers in Varzaneh and elsewhere through arrests, torture, and beatings.

The ruling elites are all dependent on oil rents for the survival of their regimes. They need the oil business to stay alive for them to stay in power. Their system is based on continued oil rent, but ultimately, the citizens’ long-term interests are with a liveable climate

The precise point oil demand will peak has been contested, and depends on a myriad of assumptions about regulation, technology and consumer behaviour. But many people say demand will peak in about 2040, and then decline.

the International Energy Association’s report Net Zero by 2050, by contrast, proposed oil demand fall from 88m barrels a day (mb/d) in 2020, to 72 mb/d in 2030 and to 24 mb/d in 2050, a fall of almost 75% between 2020 and 2050. It argued that the Gulf has all three elements needed to switch to renewables: capital, sun and large tracts of vacant land.

Opec’s own projections suggest oil demand will rise in absolute terms through to 2045, and oil’s share of world wide energy demand will fall only from 30% to 28%. Hardly a green revolution.

In the United Arab Emirates it is estimated that the climate crisis costs £6bn a year in higher health costs. The salinity of the Gulf, caused by proliferating desalination plants, has increased by 20%, with all the likely impact on marine life and biodiversity.

Aramco, the Saudi company with the largest carbon footprint in the world, is not trying to diversify at the rate of Shell or BP. Indeed, it has just announced an investment to increase crude capacity from 12m barrels a day to 13m barrels by 2027

If you see the lifestyle in the UAE, Saudi Arabia and Qatar, it is based on endless consumption

The region is responsible for only 4.7 % of worldwide carbon emissions, dwarfed by the pollution from Europe, America and China. The oil that the Middle East exports is logged against the carbon emissions of the users, not the producers.

The Gulf’s self-proclaimed first mover, the UAE, was the first country in the region to ratify the Paris agreement and is now the least dependent on oil for government revenues. Last week it announced a “net zero initiative by 2050” to be begun with $163bn (£118bn) of investments and a new minister for climate change and the environment, Mariam Almheiri. The announcement came after the UAE ordered an 80-day brainstorming session in every government department from June. It was the first petro-state to embrace net zero in domestic consumption.

Gulf states are deeply competitive, so a flurry of news is emerging. Qatar has appointed a climate minister; Bahrain is targeting net zero by 2050; Kuwait has a new emissions plan.

Fossil fuels shipped abroad are not on the Saudi’s carbon ledger, owing to UN accounting rules, and the promised internal reduction in emissions is dependent on a heavy bet that unproven blue hydrogen and carbon capture technology will work.