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Gap Between Water Supply and Demand to Widen as Climate Warms: Study

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20 Feb, 2025

This post was originally published on Eco Watch

Stronger water management efforts will be essential to overcoming the gap between supply and demand as the planet continues to warm, according to a new analysis by Lorenzo Rosa, principal investigator at Carnegie Science, and Matteo Sangiorgio, a researcher at the Polytechnic University of Milan.

For the study, the pair of researchers quantified issues of water scarcity under 1.5 and three degrees Celsius of global heating above pre-industrial levels, a press release from the Carnegie Institution of Science said.

“Water scarcity is one of the greatest challenges facing humanity this century,” Rosa said in the press release. “About 4 billion people reside and about half the world’s irrigated agriculture is in regions that experience water scarcity for at least one month each year.”

Life on Earth cannot exist without water. It is necessary for human health, food and energy security, environmental resilience, economic development and a wide range of human activities. Even though it is so important, in many places on our planet, demand for water exceeds available supply.

When water consumption is greater than the natural availability of water at any time during a month, it is referred to as a “water gap.” As time goes on, this kind of unsustainable use leads to depleted rivers, lakes, aquifers, groundwater and other natural water reserves.

“Water gaps are already an issue for communities around the world, resulting in either inadequate supplies of water or environmental degradation,” Rosa explained. “And as climate change further disrupts precipitation patterns and alters the water cycle, it will add even more stress.”

A sailing boat lays stranded on the dried-up bottom of Liptovska Mara freshwater reservoir that is at 40% of its normal capacity due to winter droughts, near Liptovsky Mikulas in Slovakia on Feb. 18, 2025. Robert Nemeti / Anadolu via Getty Images

Earlier research approached the subject by quantifying groundwater depletion or other reductions in water availability globally, while other studies looked at unsustainable use of water at the regional level.

This study combined the two strategies in order to fully comprehend the scope of the problem and make well-informed water management policies and plans going forward.

“We must be able to balance environmental resilience and the growing need for water in a warming world with a burgeoning population,” Rosa emphasized. “As cities grow, pollution, industrial water use, and irrigation will all increase, which will, in turn, exacerbate the water gap.”

Sangiorgio and Rosa quantified water gaps for scenarios under baseline, 1.5 and 3 degrees Celsius of warming, accounting for factors such as surface and groundwater depletion and water requirements for aquatic ecosystems.

The findings showed that there are already almost 458 billion cubic meters in water gaps annually. They are predicted to grow by 6% under a 1.5 degrees Celsius warming scenario and by 15% if the planet warms by 3 degrees Celsius.

“Even relatively modest increases in the water gap can put pressure on ecosystems and lead to severe shortages for agricultural use, resulting in food insecurity,” Rosa said.

Options to consider for water resources managers and lawmakers in order to increase water supplies include enhancing water storage capabilities by investing in resilient infrastructure, reusing treated wastewater, desalinating saltwater and bringing in water from other areas.

Farmers can prepare for the potential of water scarcity by planting crops that are less water intensive while investing in irrigation technologies that are more efficient.

“While water scarcity can affect entire regions, the most severe consequences are borne by the most vulnerable and impoverished populations, underscoring the important influence of economic and institutional factors in determining water scarcity,” the authors wrote in the study. “Under global warming, this fragile balance between supply and demand is likely to worsen, leading to a future where water resources struggle to meet growing societal and environmental needs. Consequently, many areas face a widening water gap, which threatens not only economic development and societies but also the health of aquatic ecosystems.”

The study, “Global water gaps under future warming levels,” was published in the journal Nature Communications.

The post Gap Between Water Supply and Demand to Widen as Climate Warms: Study appeared first on EcoWatch.

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ABB receives EPD status for gearless mill drive ring motor

ABB receives EPD status for gearless mill drive ring motor

ABB has gained Environmental Product Declaration (EPD) status for its Gearless Mill Drive (GMD) ring motor — technology used to drive large grinding mills in the mining industry.

An EPD is a standardised document that provides detailed information about the environmental impact of a product throughout its life cycle. Based on a comprehensive Life Cycle Assessment (LCA) study, the EPD highlights ABB’s commitment to transparency, environmental responsibility and supporting customers in making informed decisions on sustainability in their supply chains.

ABB analysed the environmental impact of a ring motor across its entire life cycle from supply chain and production to usage and end-of-life disposal. The study was conducted for a ring motor of a semi-autogenous grinding (SAG) mill with an installed power of 24 MW and was based on a reference service life of 25 years.

“Sustainability is at the core of our purpose at ABB, influencing how we operate and innovate for customers,” said Andrea Quinta, Sustainability Specialist at ABB. “By earning the Environmental Product Declaration for our ring motor, we emphasise our environmental stewardship and industry leadership for this technology. We adhered to the highest standards throughout this process, as we do in the ABB Ring Motor factory every day. This recognition highlights to the mining industry what they are bringing into their own operations when they work with ABB.”

The comprehensive LCA was conducted at ABB’s factory in Bilbao, Spain, and was externally verified and published in accordance with international standards ISO 14025 and ISO 14040/14044. It will remain valid for five years.

The ring motor, a key component of the GMD, is a drive system without any gears where the transmission of the torque between the motor and the mill is done through the magnetic field in the air gap between the motor stator and the motor rotor. It optimises grinding applications in the minerals and mining industries by enabling variable-speed operation, leading to energy and cost savings.

The full EPD for the ABB GMD Ring Motor can be viewed on EPD International.

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