6 May 2016
The unsustainable incentive to recycle aluminum
Recycling aluminum is universally perceived as more sustainable than using raw materials in production. Virgin aluminum is created from bauxite ore. To name one large environmental advantage of recycling aluminum, ridiculous amounts of energy are needed in order to extract bauxite ore from the ground, as only 3-5% of the bauxite ore contains aluminum. Research has shown that recycling aluminum requires on average 5% of the energy needed when manufacturing aluminum from bauxite ore [pdf]
However, it is often forgotten that the recycling process also involves ‘hidden’ environmental costs that are not included in the price. These negative externalities do not necessarily, if at all, make the recycling process less sustainable than producing virgin aluminum from bauxite, but they should not be neglected. For example, contaminated aluminum waste produces heavy chemical pollution during remelting. Additionally, recycling aluminum requires heavy machines and ovens which are often powered by fossil fuels.
Suppose there is a company in Germany (company A) that collects glass bottles from public containers. Often, glass bottles have a cap made out of aluminum, and therefore the glass bottles must be separated from the aluminum caps as both have a different recycling procedure. The company, however, only recycles glass, and thus has a supply of recyclable aluminum which they want to sell to another company that does have the necessary recycling technologies. Now, the logical way would be to sell the waste directly to that other company. However, the waste is sold to yet another company (B) that does not recycle either, but merely stores the waste and sells it to a company (C) that does recycle. On top of this, company B is situated in the Netherlands and company C in Poland. This means that now, instead of transporting the waste from Germany to Poland directly, the waste goes from Germany (A) to the Netherlands (B), after which the unaltered material is transported to Poland through Germany.
In this example, an extra process (storage) is added to the life cycle, which is not only useless and inefficient, but also increases the total environmental costs of the process. The main problem here is the rise in transportation emissions, since there is much more transportation needed. Similar situations frequently take place in reality. Companies seek for opportunities to get involved in a process in order to gain from it financially, without considering the possible negative externalities. Meanwhile, the sustainable character of recycling is completely disregarded. In other words, they act out of their self-interest rather than out of the public interest.
Bottom Line Although recycling aluminum is more sustainable than producing aluminum from raw materials, there is still much room for improvement with regards to the environmental costs. This can make aluminum recycling even more sustainable. However, this improvement seems to be stagnated by companies’ main goal to make profit.
* Please comment on these posts from my environmental economics students, to help them with unclear analysis, alternative perspectives, better data, etc.