What is a resurgent steam?

B/c a train isn't big enought to retrieve and reuse all of it, so some will be dumped into the air.

No. It utilizes steam to make it function. The boiler produces the steam.

Steam powers the Steam Engine, which in turn powers the propeller (prop) or paddle-wheel.

If you mean by Steam the Program then just go to store.steampowered.com and there will be a link to download the steam application on the right side of the page. Or boil a kettle

If your talking about Valve's Steam client, it's used for getting games by Valve and a lot of other publishers. If your talking about water vapor, if can be used for many things, like powering...