Complex sentence: It's also the site of the largest geological greenhouse gas storage project in the world, with about 30 million tonnes of CO2 safely stored underground and extensively studied by researchers as part of the International Energy Agency Greenhouse Gas Weyburn-Midale CO2 Monitoring and Storage Project.
Split into simpler sentences: It's also the site of the largest geological greenhouse gas storage project in the world, with about 30 million tonnes of CO2 safely stored underground. This has been extensively studied by researchers as part of the International Energy Agency Greenhouse Gas Weyburn-Midale CO2 Monitoring and Storage Project.