Coal dust from any source can be a lung irritant and can cause health issues if exposed to it frequently.

A one time pass by with a train will do nothing more than perhaps give you a cough. There is usually more "crap" in the air you breathe everyday than you would get from a one time shot of coal dust.

How to get from sussex to essex via underground?

I m coming for studies at sussex and i ll visit my relatives in essex . How can i go via the underground , or a train?