No. You can be completely exerted without sweating or completely soaked in sweat without feeling exerted at all. I’ve experienced both and when I’m in better shape I will sweat more without feeling exerted, while when out of shape I can feel exerted without being sweaty. The amount of energy required to move your body is about the same whether you are fit or not. So the heat production and therefore the sweat production would be the same. Being in better shape makes the body better at producing sweat to cool you down. So more sweat and less exertion.

How fit you are doesn’t determine how much you sweat. Becoming more fit can make some people even sweat more.

You don’t need FTL travel or multi-generational ships really. If you get close enough to the speed of light, time dilation can make the travel time for the people on the ship be as short as you want. Only for the people that stay on earth would the spaceship appear to take generations. Getting enough energy to reach such high speeds would be the difficult part as well as accelerating quickly without crushing the travellers.

But couldn’t you just skip the room if that happens? Eventually somebody will be willing to change rooms.

Some additional context. The survey was done by “Insa” for Bild Zeitung. “Insa” has repeatedly been criticized for their survey methods and has connections to the afd. The Bild Zeitung ist also a low quality right wing news paper. I don’t know why DW even reports on stuff Bild Zeitung writes. They are supposed to be reliable. Reading the posted article you would think DW would have done the survey but they only report on the article that was written by Bild Zeitung. And weirdly the article only appears in the russian edition of dw. Not in the German one. Lastly the question was asked very weirdly. They asked “should all Ukrainian refugees receive social assistance?” The answer to this would obviously be no for many people as many ukrainian refugees don’t need social assistance if they have a job or are personally wealthy. I can’t really find the original survey. Just the Bild article on it. But I wouldn’t but too much weight on it.

In my opinion this is extremely unfair. To earn 2000€ after taxes and contributions to social security as a single person in germany you have to earn at least 3000€ a month and because social security is shared between employer and employee, you cost your employer closer to 3600€. So almost half of what you earn goes into taxes and contributions to social security. Over 500€ just for the pensions. And those 500€ don’t even include how much taxes are subsidizing the pension. At the same time a pensioner can get as much as you do(maybe even working full time for it), in addition to getting their pension that you are subsidizing and not pay any taxes on it.

Closing the lid doesn’t reduce the number of particles that get into the air.

There is a route from Europe to China that avoids Russia. But it has to take a ferry from Kasachstan to Azerbaijan. There is no Rail connection through Iran as far as I know. Then it goes through Georgia and turkey. I don’t know the exact route from there. But I think there is usually another ferry necessary from eastern turkey/georgia to Europe even though there would be a land connection and Bridge from turkey to Greece. But I think the ferry is easier because they would have to change the train anyways between Georgia and turkey due to different rail Gauges.