 Why is hydrogen a viable fuel source now? My name's Mark Pascovitch, I'm associate professor in physics here at Curtin University. So hydrogen is a great way to store large quantities of renewable energy. We need this as we transition away from fossil fuels. So when we generate hydrogen using an electrolyzer, it requires 54 kilowatt hours of electricity for every kilogram of hydrogen we produce. When we get the electricity back from hydrogen, it requires 33 kilowatt hours per kilogram. There's a little bit of energy lost there, but it's a very cheap way to store electricity over the long term. The best way is to use electricity directly, in fact. But if we do need to store it, as we do from renewables, then we have to pick an option, and hydrogen is a great bet. This is one of the only ways that we can store a large amount of energy for the needs of the whole of Australia.