As data centers multiply to meet AI demand, they are straining power grids, draining water supplies, and reshaping the land and air around them. Every question sent to AI models requires physical infrastructure that consumes energy, water, and land. Data centers, which support services like cloud storage and social media, have a significant physical footprint. According to researchers from the United Nations University, if data centers were a country, their electricity use would rank as the 11th largest consumer globally.
Data centers are among the fastest-growing consumers of electricity, operating continuously while cooling systems work to prevent overheating. In Frankfurt, Germany, the grid is saturated, with no new connections available until at least the 2030s, as data centers consume about 41% of the city’s electricity. In Dublin, this figure is approximately 82%. Data center electricity consumption is projected to double by 2030, reaching about 945 terawatt-hours, equivalent to Japan's annual consumption, according to the International Energy Agency.
This rising energy demand increases reliance on fossil fuels. A 2024 study found that over half of the United States' data centers are powered by fossil fuels, emitting more than 105 million tons of CO2. Offsetting these emissions would require over 31,000 wind turbines operating continuously for a year. Additionally, the demand has delayed the retirement of 15 coal-fired plants in the US, which emitted nearly 65 million tons of greenhouse gases in 2023. Utilities are also constructing new gas-fired power plants, with over 100 GW of additional capacity announced, leading to more carbon emissions than burning 111 million pounds (50.4 million kilograms) of coal.
Data centers can also utilize renewable energy, which can alleviate pressure on local power supplies and allow for surplus energy to be sold back to the grid. However, using green electricity for data centers reduces the availability for other sectors, such as transportation and emissions-heavy industries.
Cooling systems in data centers consume millions of gallons of water daily. A large facility can use up to 5 million gallons a day, comparable to the needs of a town with 10,000 to 50,000 residents. Approximately 80% of the water used for cooling evaporates, with the remainder becoming wastewater that can overwhelm local treatment systems. In northern Virginia, nearly 300 data centers collectively used about 2 billion gallons of water in 2023.
More efficient cooling methods, such as immersion cooling and closed-loop systems, can reduce freshwater use by up to 70%. However, cooling does not eliminate heat; it simply transfers it outside, which can exacerbate the urban heat island effect. Research in Phoenix, Arizona, indicates that a large data center can emit as much waste heat as tens of thousands of households, raising nearby land surface temperatures by up to 9 degrees Celsius (16 Fahrenheit) and air temperatures by up to 2 degrees Celsius.
Data centers also contribute to air pollution. Coal and gas plants release toxic particulate matter, leading to respiratory and heart diseases in nearby communities. On-site diesel generators, used for backup power, emit harmful air pollutants, contributing to an estimated 14,000 asthma cases and significant public health costs in Virginia.
The construction of data centers requires large plots of land, which can threaten biodiversity and disrupt local ecosystems. For instance, an 18-acre (7-hectare) agricultural area in Hattersheim, Germany, was rezoned in 2024 for a data center campus, impacting local green spaces. Additionally, infrastructure like gas pipelines and power plants needed for these facilities can fragment habitats and erode soil along their routes.