Seaweed grows faster with more CO2 - just one of those facts that interferes with the dominate narrative.
That being said - Instead, they should feed seaweed to chickens instead of corn - chicken meat is super high in LA(the most common O-6) - I think LA is the likely cause of the obesity pandemic and the great increase in depression after the 1960's when it was introduced on the market. Concentrated veg oils are obviously not human food.
The increase in CO2 has slowed - in part due to the great increase of plant mass:
"Over the past 50 years, the amount of CO2 absorbed by the oceans and terrestrial biosphere annually has more than doubled"
Not sure how this can be happening - as everyone says the science is settled...
So what happens if it doubles again over the next 50 years?