Some of the biggest construction projects of the next few decades are designed to support systems people rarely think about.
1. Electricity Grids
Electricity demand is rising as countries add data centres, electric vehicles, factories, and renewable power.
The World Economic Forum warns that ageing grids are already under pressure, while new demand is increasing the need for major upgrades.
2. Data Centres
The AI boom is creating a huge need for new computing infrastructure.
PwC estimates annual investment in data-centre buildings will more than double between 2024 and 2027, reaching about $252 billion.
3. Battery Storage
Solar and wind power produce electricity intermittently, so countries need ways to store energy and release it when demand rises.
Grid-scale batteries are becoming an increasingly important part of new electricity systems.
4. Semiconductor Factories
Governments and companies are investing heavily in new chip factories to reduce dependence on concentrated supply chains.
Semiconductors now sit behind everything from cars and phones to artificial intelligence and industrial equipment.
5. Critical-Mineral Processing
The world isn’t only building mines. It is also investing in facilities that process lithium, copper, rare earths, and other materials needed for electrification.
PwC projects annual infrastructure spending in critical-mineral mining to reach $128 billion by 2050.
6. Water Infrastructure
Cities are increasingly investing in treatment plants, recycling systems, reservoirs, and upgraded distribution networks.
Climate change, population growth, and industrial demand are making reliable water infrastructure increasingly important.
The scale is enormous. PwC estimates the world will need about $151 trillion in infrastructure investment by 2050 across transport, power, digital systems, water, mining, and other sectors.