The best replacement for black smoke is white smoke.

The best alternatives to black smoke are rated as following:
★★★★★  white smoke
★  grey smoke
★  gray smoke
★  blu smoke
  blue smoke

Your alternative for black smoke is not listed? Suggest!
Speaking about black smoke, one probably shouldn't forget about diesel engines.

Other search terms related to black smoke and their ratings are:
★★★★★ diesel engines
You have in mind a companion for black smoke and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of black smoke in all years. Click on graph for more.
black smoke
white smoke
grey smoke