In the late 19th century, scientists were worried that Earth was going to freeze due to the ongoing depletion of CO2 from the atmosphere.
Arrhenius said that doubling or tripling CO2 would prevent an ice age, and bring back the mild temperatures of the tertiary time.
Arrhenius said that the atmosphere had been robbed of CO2 by formation of coal, and that burning coal would more than double the rate of plant growth. Also note that he reported 1:2500 (400 PPM) CO2 in 1910, same as they measure at Mauna Loa today.
Arrhenius spoke in glowing terms of the benefits of increasing CO2.
And then the passengers of this Good Ship Earth will have vast fields of good land, which are not good now