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Cloud Storage

The pollution caused by data centres comes mainly from their continuous need for electricity as they operate 24/7. As they process the constant flow of data, data centres also generate colossal streams of heat that need to be abated to prevent the equipment from malfunctioning. Data centres therefore require massive cooling systems (either from air conditioning or water cooling) which are additional sources of negative environmental impact that need to be considered when tackling the issue of data storage.

Big data companies such Amazon, Google, or Facebook have already advertised about their modern data centres which are meant to help them reach their carbon-neutral objectives. While these infrastructures indeed greatly reduce their impact on the environment, Monserrate (2022) points out that the larger issue relies on smaller-scale data centres which are numerous and often located in old infrastructures, not optimised for cooling, and data storage capacity needs.

The current impact and estimated exponential growth of cloud storage is a challenge that has to be tackled through a multi-level response. There is a wide range of simple measures that can be implemented to efficiently reduce data storage pollution and it is up to both professionals and organisations to implement it effectively in daily practice. It is also worth mentioning that reducing overall individual and organisational data storage within a whole organisation will also greatly reduce economic costs while making a significant contribution to the green digital transition.

Important facts

The carbon footprint of digital storage is not well understood or regulated. There is currently no standardised method for calculating the carbon footprint of data storage, and data storage companies are not required to disclose their emissions or energy usage.

The Cloud now has a greater carbon footprint than the airline industry. A single data centre can consume the equivalent electricity of 50,000 homes.

Data centres consume approximately 200 TWh of electricity or nearly 1% of global electricity demand, contributing to 0.3% of all global CO₂ emissions.

The energy consumption of digital data storage is a significant contributor to greenhouse gas emissions. In 2021, data centres were responsible for around 1% of global carbon emissions, and this is projected to increase to 3% by 2025.

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