Multiple reports say kelp, a type of seaweed, could be used to produce biofuels that may one day power ships and aircraft. The outlets describe kelp as a potential feedstock because seaweed can be converted into fuel products such as bioethanol. While the promise is that biofuels could lower overall greenhouse-gas emissions compared with petroleum-based fuels, the sources also emphasize major obstacles that prevent near-term adoption. These challenges include the practical and environmental aspects of producing kelp at scale, as well as technical hurdles in converting kelp-based fuels efficiently. One report highlights that burning bioethanol can release hazardous gases, creating concerns about air quality and safety. Overall, the coverage presents kelp biofuels as a longer-term possibility rather than a ready alternative, citing both potential climate benefits and complications involving emissions and production viability.