Plastic waste is difficult to be naturally decomposed, which has been a headache. In recent years, many plastic substitutes that are easily decomposed by nature have come out. This is a human effort to reduce plastic waste. However, this effort has almost no effect. According to statistics, in recent years, the proportion of plastic waste in the landfills of most waste treatment companies worldwide has not decreased but increased in recent years. If the following options are true, what will weaken the above argument most? ['In recent years, due to the implementation of waste classification, more and more wastes that have been landfilled in the past have been recycled.', 'Plastic substitutes have very low profits and manufacturers lack the incentive to invest.', 'In recent years, the variety of goods packaged in plastic has grown significantly.', 'The vast majority of the above-mentioned waste treatment companies belong to developed or middle developed countries.']