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.