As soon as I post comments to this video, they seem to disappear. It is possible that they are being censored because I am including links.
Here are my comments...
Iron Fertilization, in theory, can pull as much CO2 as we want from the atmosphere: https://en.wikipedia.org/wiki/Iron_fertilization
However, all this fuss over CO2 fails to understand the history of CO2 on this planet. If you look at the atmospheric CO2 level over the last 40 million years, you will see that it is nosedive. (https://www.pnas.org/content/99/7/4167 Figure 4.) This is because natural processes sequester CO2. We were actually running out of atmospheric CO2. During the last period of glaciation, the CO2 level dropped almost to the level where all terrestrial plants die. The entire history of the Earth is one of massive CO2 decline.
All this fuss over global warming fails to understand the temperature cycle on planet earth. Every 100,000 years the temperature of the planet quickly shoots up 8 to 15 degrees celsius. Then it remains stable for 10,000 years after which it goes into rapid decline and then we get 80 to 90 thousand years of massive glaciation where half of North America is covered by ice. All of the human civilization arose during the brief 10,000-year warm period that we are currently in. Science has said that no matter what we do, we will be back to an ice age in another 10,000 years. The period from 1500 to 1850 was actually known as "The Little Ice Age." The earth appeared to be cooling until we interfered with all that pesky CO2.
What causes these changes? The Milankovich cycles. The other planets tug on the Earth's orbit and affect its tilt. We are currently halfway between the maximum tilt (which melts ice near the poles) and the minimum tilt. (https://en.wikipedia.org/wiki/Milankovitch_cycles)