It's only been a year since Greta Thunberg started her climate strike for the climate - during Friday, the various climate protests around the world are estimated to have attracted around two million people. An estimated six million people participated in the demonstrations throughout the week.

In Friday's "Current", political scientist and debater Stig-Björn Ljunggren, a member of the Social Democrats, was asked why he describes the phenomenon as "a revival movement for climate populists".

- It has very strong features of some kind of religious revival movement where you talk about succeeding in bringing sinners like Trump. It's this feeling of doom, that we have to do something now, he says, adding:

- The populist is quite clear, the belief in this spontaneous popular movement, that it can arrive at something rational and that the elite fails.

Claims that the debate is hampered

According to Stig-Björn Ljunggren, this can hamper the debate.

- Every attempt to nuance the discussion means that you become associated with those who deny, those who are not believers but sinners. If you also make the slightest attempt to nuance, you are often supported by a small few whole and semi-foolish people who give up on Greta, which I highly respect and think is a fantastic personality.

The political scientist says he wants to see more concrete proposals.

- If the worst pessimists are right now and we are going to do something about this, it means a halt to the industrial lifestyle and I do not think that the Swedish trade union movement will go to the brink of dismantling it. It is perhaps a bleak message than many would like to take, that is, that we should change our way of life totally.

"We are optimists"

Ursula Berge, social policy manager at the trade union SSR, and former S-debater, however, gave a bump in "Aktuellt".

- On the contrary, with technological development and innovations, we will develop society into a sustainable society in the future. We are optimists. You are the one who describes these dystopias. We are optimists and believe that society can go in the right direction, we just have to get the politicians to focus on it.

See more of the debate in the clip above.