Fifth Austrian World Summit 2021 on Climate Change held in Vienna

Arnold Schwarzenegger, in Vienna, leads a climate change discussion with politicians and activists. At 73, he emphasizes grassroots movements and public education as key solutions, beyond political confrontation. He highlights pollution's deadly impact and stresses global responsibility, citing China and India. Schwarzenegger advocates for leadership and action, drawing parallels to the moon mission. Despite differences, he and Greta Thunberg exemplify the diverse spectrum of climate activism.

In what way does Schwarzenegger compare climate activism to the space race?

What differences and similarities does the text mention between Greta Thunberg and Arnold Schwarzenegger?