Using the oil to power the engine is such a good idea Ella, it makes your invention really sustainable, which is exactly what we need to make our world more environmentally friendly! Including a squasher room also sounds great, you have made room for more waste to be removed from the ocean, it sounds like your invention would get lots of important work done! I like how you have illustrated the process of your invention going on in the depths of the boat in your drawing. It really brings it to life being able to see all of the inner workings! Fantastic Ella, keep it going!