Please don’t burn your collection of plastic bags and packages along with the chometz. I know of no posuk that says ‘for seven days plastic bags shall not be seen.’
In my community in Israel, where the city amazingly puts barrels for chometz outside apartment buildings and doesn’t put out the fires, the plastic smolders throughout the night and continues burning through the next day. I saw one barrel shooting flames throughout Shabbos – with children playing next to it. Our entire apartment smells of burnt plastic. Can’t be healthy and it certainly is not pleasant.