What is an advantage of using hydrogen fuel instead of petrol?

The use of hydrogen fuel presents a significant environmental advantage, particularly because it burns cleanly to produce only water as a byproduct, without generating carbon dioxide (CO₂). This characteristic is crucial in the context of climate change and air pollution, as CO₂ emissions from fossil fuels like petrol contribute heavily to greenhouse gas accumulation in the atmosphere. By utilizing hydrogen fuel, we can significantly reduce the carbon footprint associated with energy production and usage, making it a more sustainable energy option.

In contrast, while some options may suggest benefits in cost, energy output, or transportation convenience, these factors do not address the critical environmental impact as directly as the clean emissions from hydrogen. Therefore, the ability of hydrogen to produce only water when combusted is a key advantage over traditional petrol fuels, emphasizing its potential role in a cleaner energy future.