It does depend on how recently the foliage was culled. If you let it dry it won't smoke so badly. The stuff I was tempted to burn was cut in the autumn. and since it won't compost or chip I feel more justified in burning it. The incinerator makes life easier but it less fun than a traditional fire but it is a better option since increased planting means I no longer have a suitable bonfire glade. The heat is more intense though so I was quite glad of my workplace fire training when I seemed ready to create the towering inferno in microcosm.
And there is no point in blaming China when the states won't get its act together - rather do as I say not as I do.....