How underground data centres & agrovoltaics can power food security

As cloud adoption accelerates across nations, one truth becomes impossible to ignore: data centres are now the backbone of the digital economy and among the largest consumers of energy. With AI models growing larger, data-heavy industries expanding, and digital payments rising globally, the demand for computing power is multiplying.

Traditionally, this leads to one outcome: more energy, more cooling, and more strain on national grids.

But a new model is emerging; one that treats data centres not as energy liabilities, but as circular, regenerative infrastructure that actively supports agriculture, food security, and environmental resilience.

Welcome to the future of Sustainable Integrated Data Farms.

1. Data Centres Go Underground - Stability With Zero Land Conflict

Placing data centres below ground offers multiple advantages that matter especially in markets like Australia, the UK, and Singapore where land-use pressures, urban heat effects, and climate volatility are rising:

Why underground data centres make sense

• Natural insulation drastically reduces cooling demand.
• Reduced temperature fluctuations improve server efficiency and lifespan.
• Security and disaster resilience increase - underground environments protect against extreme weather events, fires, and physical threats.
• No surface land competition, freeing the top layer for productive use.

Instead of dedicating prime land to server farms, underground deployment turns the same footprint into a dual-purpose clean-tech asset.

And what goes above them? Something far more valuable than concrete roofs.

2. Agrovoltaics on Top: The Dual Harvest of Energy + Agriculture

The land above the underground data centre becomes a solar-agriculture system; an agrovoltaic farm. This involves raising solar panels to allow crops to grow underneath, enabling:

• Energy generation on-site
• Shaded, protected farmland perfect for hot climates
• Optimized water retention
• Dual income streams (electricity + crops)
• Local food production near urban demand centres

Countries like Australia and Singapore - which face heat stress and limited fertile land - can benefit massively from this model. The UK benefits via land efficiency and decarbonisation targets.

Popular agrovoltaic crops include:

• leafy greens
• chillies
• berries
• herbs
• drought-resistant vegetables
• pollinator-support crops (e.g., flowers for bees)

This creates a living, productive ecosystem sitting above high-performance computing and the synergy doesn't end there.

3. Turning Data Centre Heat into Food Security: Solar-Assisted Drying Facilities

Data centres generate large quantities of low-grade heat which were traditionally wasted. Instead of venting it into the atmosphere, this model channels the heat into food drying and dehydration facilities, helping preserve chillies, onions, herbs, fish, fruits as well as grains. The results:

• 100% free heat energy for drying operations
• Reduced post-harvest losses, especially in rural Australia and Asia
• Value-added products for domestic and export markets
• Stable year-round food processing capacity

This in-turn creates a circular resource loop:

Digital heat → Food preservation → Reduced food waste → Lower emissions

The combination of agrovoltaics + waste heat drying transforms farms into climate-resilient micro food hubs, powered by the very servers fueling digital industries.

4. Solar-Powered Liquid Nitrogen Plants for Cooling: The Future of Clean Thermal Management

Instead of traditional chiller-based cooling that consumes massive amounts of electricity, this model uses liquid nitrogen (LN2) produced entirely using on-site solar power with;

1. Solar panels power a small-scale cryogenic plant.
2. Liquid nitrogen is produced and stored.
3. The LN2 cooling lines run through the underground data centre.
4. As nitrogen evaporates, it absorbs heat from servers directly.
5. Cold gas can be recaptured or vented with near-zero emissions.

Benefits

• Ultra-efficient cooling
• Near-silent and vibration-free
• No reliance on synthetic refrigerants
• Lower grid dependency
• Stable performance even in hot climates

This solves one of the biggest environmental criticisms of data centres: massive cooling energy demand.

Solar-powered LN2 turns cooling into a clean, renewable, and scalable solution.

5. A Full Closed-Loop System: Zero-Waste, Maximum Productivity

When all components work together, the system looks like this:

Underground

• Data centre
• LN2 cooling lines
• Thermal exchangers
• Energy storage

Above ground

• Agrovoltaic solar farm
• Crop production
• Pollinator ecosystems

Adjacent

• Solar-powered liquid nitrogen plant
• Heat-powered food drying facility
• Climate-controlled storage units

Circular flows

• Solar energy → Powers LN2 + servers
• Data centre waste heat → Food drying
• Data centre location → Enables agrovoltaics
• Crops → Enter value-added drying facility
• Waste from drying → Compost → Supports soil health
• Nitrogen gas vented → Returns harmlessly to atmosphere (78% air is nitrogen)

Every calorie of energy is used multiple times. Every square metre of land performs more than one function. Every component supports food security, technology, and climate targets simultaneously.

6. Why the World Need This Now; The case of 3 different counterparts

Australia

• Extreme heat driving cooling demand
• Vast land and solar potential
• Growing AgriTech sector
• Rising rural digitisation needs

United Kingdom

• Net-zero legislation accelerating
• Limited land availability
• Strong fintech and cloud services industry
• Demand for greener digital infrastructure

Singapore

• Global data centre hub
• High cooling costs in tropical climate
• Food import dependency
• Ambition to produce 30% of food locally by 2030

This model directly aligns with the strategic goals of all three markets - decarbonisation, digitalisation, and food resilience.

7. The Vision: Data Centres as Climate Assets, Not Energy Burdens

For decades, data centres were seen as infrastructure necessary for digital growth but harmful to the environment. This new model flips that narrative entirely with a new paradigm for tech infrastructure; one where digital systems directly nourish the physical world.

• Data centres become anchors of rural development.
• Servers become sources of thermal energy for food systems.
• Solar power becomes multi-use: cooling + computation + crops.
• Land becomes 3-in-1 productive: digital + agricultural + energy production.
• Sustainability becomes a competitive advantage, not a regulatory checkbox.

Conclusion

The future of digital infrastructure lies at the intersection of technology, agriculture, and renewable energy. By building underground data centres with agrovoltaics above, heat-to-food drying beside them, and solar-powered LN2 cooling integrated across the system, nations can turn the world's most energy-hungry facilities into regenerative, climate-positive assets.

This is not a distant vision but a blueprint that countries can deploy today to achieve net-zero targets, strengthen food resilience, and build the next generation of sustainable digital economies.