Hong Kong's data centres have been under the spotlight recently, with a UN study highlighting their significant environmental impact. The study, titled "Environmental Cost of AI's Energy Use," sheds light on the carbon-intensive nature of Hong Kong's data infrastructure.
One of the key findings is the heavy reliance on fossil fuels for energy generation in Hong Kong. With 67% of its energy derived from fossil fuels, the city's data centres contribute to a carbon footprint that is 43% higher than the global average. This is a concerning statistic, especially when compared to countries like the US, Germany, and Italy, which have lower carbon intensities.
What makes this particularly fascinating is the contrast between Hong Kong's carbon footprint and its water and land consumption. Despite being one of the most carbon-intensive grids, Hong Kong ranks among the lightest in terms of water and land usage. This paradox can be attributed to the city's energy mix, which relies less on hydropower and renewable energy sources, thus reducing its water and land footprint.
However, it's important to note that the environmental impact of data centres goes beyond just carbon emissions. The UN report also highlights the water and land footprints associated with cooling heat-intensive data centres. AI-related water consumption is projected to meet the basic annual domestic needs of over a billion people by the end of the decade, while its land footprint could exceed the size of metropolitan Jakarta.
As a trade and logistics hub, Hong Kong's data centres play a crucial role in connecting over 300 internet service providers. The city's telecommunication networks are extensive, with multiple submarine optical fibre cable systems in place. The government is even constructing a new data facility in Sandy Ridge, further emphasizing the importance of data centres to the city's economy.
Despite the environmental concerns, data centre operators in Hong Kong are actively striving to enhance energy efficiency. The Digital Policy Office and the Electrical and Mechanical Services Department (EMSD) have implemented policies and initiatives to reduce power consumption and environmental impacts. The EMSD's Green Data Centres Practice Guide promotes efficient design, procurement, and operations, as well as the use of assessment tools for measuring environmental effects.
In my opinion, the UN study serves as a wake-up call for Hong Kong and the world. While AI and data centres are essential for our digital future, we cannot ignore the environmental consequences. It's time to explore sustainable alternatives and innovative solutions to reduce the carbon footprint of data centres. The challenge is to strike a balance between technological advancement and environmental responsibility.
The study also raises a deeper question about the daily use of AI models. It reveals that day-to-day AI usage accounts for a significant portion of energy demand, with image generation requiring a thousand times more energy than text queries. This highlights the need for efficient AI model training and usage practices to mitigate environmental impacts.
In conclusion, Hong Kong's data centres face a unique challenge: balancing their vital role in the digital economy with their environmental impact. The city must lead by example, implementing sustainable practices and setting a precedent for other global hubs. The future of our digital world depends on it.
