Hi, I am in grade 10 and for my final project, I am writing a report on hydrogen cars. We need to relate hydrogen cars to chemistry, ecology, climate change, and light and geometric optics. Can someone tell me how hydrogen powered cars relate to each of these? I am really unsure and need help... In ecology, all we really did were ecosystems, and nitrogen cycles, water cycles, and various species. In light and optics, we did all the ways light is produced, all the diagrams, reflection, refraction, etc. And in chemistry, we covered a lot of compounds, and the periodic table. In climate change, we are now learning about water and climate, and also global warming (I have already related it to global warming though) Please help :) Thank you soooo much!