DATACENTERS data center
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Side benefits include:
reducing cost
facilitating business continuity and high availability
enabling cloud and grid computing.
=== Network infrastructure ===
Communications in modern data centers are most often based on networks running the Internet protocol suite. Data centers contain a set of routers and switches that transport traffic between the servers and to the outside world, which are connected according to the data center network architecture. Redundancy of the internet connection is often provided by using two or more upstream service providers (see Multihoming).
Some of the servers at a data center are used for running the basic internet and intranet services needed by internal users in the organization, e.g., e-mail servers, proxy servers, and DNS servers.
Network security elements are also usually deployed: firewalls, VPN gateways, intrusion detection systems, and so on. Also common are monitoring systems for the network and some of the applications. Additional off-site monitoring systems are also typical, in case of a failure of communications inside the data center.
== Energy use and environmental impact ==
Energy consumption and the environmental impacts it creates are a central issue for data centers. Power draw ranges from a few kilowatts (kW) for small server racks to several tens of megawatts (MW) for large facilities. Modern hyperscale data centers can exhibit power densities exceeding 100 times those of conventional office buildings, primarily due to the high concentration of servers and cooling systems required to manage continuous digital workloads. For higher power density facilities, electricity costs are a dominant operating expense and account for over 10% of the total cost of ownership (TCO) of a data center.
As of 2024, data centers in the U.S. are primarily powered by natural gas, which supplies 40% of their electricity (with renewable energy at 24%, nuclear at about 20%, and coal at about 15%). The Associated Press reported that electricity for AI data centers in the U.S. would likely come from natural gas or oil, as companies prefer using currently available power plants, which primarily use fossil fuels. Fossil energy is also often cheaper in locations where data centers are developed, and experts believe that energy demands from generative AI and data centers would be difficult to fulfill with renewable energy alone. Some companies such as Google, Amazon, and Meta have expressed interest in nuclear power for their data centers. As of 2020, according to the IEA, solar photovoltaic-generated electricity is at its lowest cost in history. Other data centers, including xAI's Colossus, OpenAI's Stargate, and Meta's Prometheus use their own off-grid natural gas plants. Electric vehicle and lithium-ion batteries have also been used for powering data centers, including for Colossus.
Power utility companies make upgrades to their infrastructure to handle demands of new data centers, and the price for these changes typically falls on residential or smaller commercial consumers. In 2025, the Mountain Valley Pipeline announced plans to expand its capacity by 25% to meet energy needs for data centers.
In December 2025, the Federal Energy Regulatory Commission (FERC) published a unanimous order allowing data centers in the U.S. to have a direct connection with power plants. United States Secretary of Energy Chris Wright expressed support for un-retiring coal plants to power AI data centers. Electricity demands from AI data centers have slowed or reversed the retirement of peaking power plants in the U.S. For example, in 2025, Southern Company announced that energy use from data centers would prevent the company from retiring coal-fired power plants as it had earlier promised. In Nevada, the Desert Research Institute (DRI) calculated that 35% of the state's energy production could go to data centers by the year 2030 if all projects planned in the state as of 2026 are completed. DRI also stated, in areas where there are clusters of data centers, local consumers may end up paying the extra cost of expanding infrastructure.
=== Greenhouse gas emissions ===
In 2024, data centers were estimated to account for about 1.5% of global electricity consumption (approximately 415 TWh) and around 1% of greenhouse gas emissions according to U.S. Environmental Protection Agency (EPA). However, the rapid expansion is causing projections to rise sharply. Due to accelerated demand from AI, data center's global electricity consumption is projected to more than double to around 945 TWh by 2030 in the IEA's base-case scenario, which represents just under 3% of 2030 total global electricity consumption. This growing electricity demand, much of which is still generated by fossil fuels, increases the potential environmental impacts. In addition to operational energy demand, embodied life cycle emissions should be considered, which include the extraction, manufacturing, transportation, and recycling or disposal of materials used in the construction of facilities and hardware.