Autant en emporte le vent = That is but so much breath spent in vain; It is not of the slightest consequence.
Ne faites pas attention à ses menaces, autant en emporte le vent = Pay no attention to his threats, they are as light as air.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "emporte" in a variety of sentences. We hope that you will now be able to make sentences using this word.