Technology correspondent Alex Sims takes a deep dive into data centres and why they're proving to be so controversial around the world, including here in New Zealand, where the Greens have called for a one-year moratorium on consents for them. She'll look at what's happening overseas and explore the benefits of data centres, as well as the concerns about their usage of land, electricity, water and e-waste. Alex Sims is a Professor in the Department of Commercial Law at the University of Auckland Business School and an expert on blockchain technology, copyright law and consumer law.