A green data centre is one that prioritises sustainability and energy efficiency in its design, operations, and maintenance, aiming to minimise its environmental impact while maintaining high performance. This is achieved through several key strategies, including the use of renewable energy sources such as solar or wind power to reduce reliance on fossil fuels. Energy-efficient hardware, advanced cooling techniques like free cooling or liquid cooling, and effective airflow management using hot and cold aisle containment are also integral to green data centres. These facilities often implement rigorous energy monitoring and management practices to optimise power usage effectiveness (PUE) and reduce waste. Being a green data centre means not only adopting these technologies and practices but also committing to ongoing improvements and innovations that further reduce environmental impact. This approach benefits both the planet and the bottom line, as reduced energy consumption translates to lower operational costs, and the commitment to sustainability can enhance a company’s reputation and appeal to environmentally conscious customers and partners.