In the 1970s did Climate scientists warn the world of global cooling?

But he also warned that if those same levels increased by 50%, the planet would experience a warming of between 5 and 6°C, which, as Arrhenius pointed out, meant, among other things, that Scandinavia would enjoy a more benign and pleasant climate. In addition, the article also identified human industrial activity as the main source of new CO2 into the atmosphere. Although he estimated that, at the rate of emissions at that moment, this concentration would take about 3,000 years to reach, we now know that this forecast was very moderate and optimistic.