This document summarizes presentations from an engine technology seminar hosted by Combustion Engines Finland on alternative fuels and energy solutions. It discusses Combustion Engines Finland's role in research and manufacturing of combustion engines, hybrid systems, and exhaust treatment. The document also summarizes presentations from Wärtsilä on their visions for a smart energy future with 100% renewable energy enabled by flexible generation including engines and storage, and their smart marine ecosystem vision to apply smart technology and optimize ship performance to reduce emissions. Alternative low-carbon fuels are also discussed including biomass, electricity from renewables, hydrogen, and biofuels.