REMOVING excess CO 2 from the air, producing negative emissions hydrogen, and reversing ocean acidification are the three main goals of clean technology company Planetary Hydrogen. I spoke to founders CEO Mike Kelland and CTO Greg Rau about their plans to use their electrochemistry process to produce hydrogen while also capturing CO 2 from the air which can then be safely stored in the oceans as a carbonate. The Earth has a natural cycle to regulate CO 2 on geological timescales. CO 2 is released from sources such as volcanoes, and then eventually is stored in sediments, the ocean, or living organisms. However, humans burning fossil fuels has released excessive amounts of CO