Seaweed aquaculture is one of the fastest-growing segments of global food production. With concerns about the environment, food security and climate change mounting, seaweed startups could play a major role in the sustainable future of our planet. Here some sustainable applications and solutions from seaweed: Transportation: Seaweed can be used, in total or in part, for biofuel production, with a potential CO2 mitigation capacity, in terms of avoided emissions from fossil fuels.