Carbon Dioxide & Greenhouse Gas Removal (CDR), Sequestration, & Decarbonization
Mariculture, ocean biofuels, & decarbonizing marine transportation
Although marine agriculture, also known as mariculture, is absolutely a regenerative food source, there is an equally exciting opportunity for aquatic forestry for carbon sequestration and greenhouse gas reduction. “Kelp and other seaweeds can grow very fast – at rates more than 30 times those of land-based plants, with the capacities to draw in so much carbon dioxide that they help de-acidify the water. By drawing CO₂ out of the ocean waters (thereby allowing the oceans to absorb more CO₂ from the atmosphere) they help fight climate change. ( ). In fact, the brown seaweed kelp is estimated to absorb five times more carbon than land-based plants. Additionally, greenhouse gas emissions are also able to be combated through the red seaweed species formally known as Asparagopsis taxiformis, which reduces intestinal methane production in beef steers by more than 80% when added to their feed. ( ) Beyond mariculture, marine transportation is also a major contributor to greenhouse gas emissions. Marine shipping accounts for around 2.7% of global greenhouse gas emissions.(https://www.shell.com/energy-and-innovation/the-energy-future/greenhouse-gas-emissions-in-shipping.html ). Additionally, cruise ship emissions make up 0.2% of all global carbon dioxide emissions from fossil fuel combustion and cement production. 5 (https://www.tourismdashboard.org/explore-the-data/cruise-ship/#:~:text=Based%20on%20an%20estimated%20total,to%20Tokyo%20in%20economy%20class. ) In developing cleaner fuel sources there is the opportunity for decarbonization. Beyond that converting marine transportation to clean fuel sources such as biofuels or entirely electrified fleets will make a significant difference in reducing their overall carbon footprint.