Data centres and data transmission networks, the so-called digital infrastructure, require a lot of power to drive the internet. Their powerful computers and storage servers emit carbon and impact the environment too. As the world actively embraces the digital economy, data centres and related facilities also become the latest target of actions by Big Tech and climate-change proponents alike. China, as the world's largest greenhouse gas emitter, is also taking steps to cut emissions. Here's what you need to know about data centres and how they are linked to climate change in the world's second largest digital economy. What are…