Svenja Geerken, Bio-based News editor: Currently, plastics are under great pressure. But you still seem to like plastics?
Michael Carus, CEO nova-Institute: Absolutely. There are no other materials that have such a broad spectrum of properties and can be brought into any conceivable form with the greatest efficiency. In addition, plastics perform better than other materials under most sustainability criteria. This is due on the one hand to the high production efficiency already mentioned and, for example, to their low density with which they can score points in transport. In addition, product properties can often be achieved with much less material input.
Svenja: So everything is actually good and the current plastic hysteria lacks any basis?
Michael: Not at all! There are significant problems, but all of them can be solved and must be solved urgently. It is estimated that around 20% of the plastics produced worldwide end up in the environment uncontrolled, that is 60 million tonnes per year, of which around 8 million tonnes end up in the sea. The rest remains on land in soils, lakes and rivers. This is completely unacceptable. The other problem is the use of fossil carbon as a raw material that escapes into the atmosphere as CO2 at the end of life. This also has no future, the entire chemical industry must switch to renewable carbon – which can come from recycling, biomass or CO2.
Svenja: According to a recent survey, almost 80% of Germans consider plastics to be harmful rather than indispensable. Can we really solve these problems or should we not switch to other materials?
Michael: But to which ones? The reserves of metals are limited and mining often takes place under inhumane conditions. And minerals? Sand for cement is already becoming a scarce commodity worldwide. In the future, we will no longer be able to build our houses from reinforced concrete, as we do today, but rather from plastics. Because their raw material carbon is practically unlimited: As CO2 in the atmosphere, which we can make usable with the help of renewable energies or as biomass. That is enough raw material for the next millennia. This is the reason why plastics will gain in importance and the age of plastics has only just begun. And this is precisely why plastics must become sustainable as quickly as possible and regain a good image.
Svenja: And who bears the main blame for the whole dilemma?
Michael: The chemical and plastics industry, which has systematically tried to sweep problems under the carpet and sit out instead of actively pointing out and solving the problems. As one should expect from a crucial future industry!
Svenja: What are the mistakes that were made?
Michael: The microplastic problem has been well known for at least ten years, which was when the Austrian documentary film “Plastic Planet” was first shown. But the industry acts according to the motto: ignore it, do not talk or write about it, just sit out the problem. The considerable quantities of plastic waste, which are also released into the environment in an uncontrolled manner in the European Union, are systematically missing from the plastic statistics. For decades, bans on hormone-active plasticizers were prevented. Eyes were closed on the large-volume plastic waste exports to developing countries, which count as material recycling. Every expert knew what really happened to the plastics. In the European Union, less than 10% of waste plastics are recycled into new plastics. Thermoplastics can be recycled very well if collected in their pure form, better than most other materials. Instead of tackling the actual problems, it was perceived only as “communication problems”.
And when the plastics industry is asleep, they should not be surprised if the EU Commission and the national environment ministries now take matters into their own hands. The recently adopted plastics strategy, including restrictions and bans on certain disposable plastic products, is the consequence of this behaviour.
Svenja: And are politics doing better than the industry now in tackling the problem?
Michael: I’m afraid not. Of course, there are some sensible measures being taken, such as the ban on oxo-degradable plastics, which decompose particularly quickly into microplastics. However, the “single-use ban” is a purely symbolic policy and a bad one at that, which will have little effect, but will heat up the plastic hysteria, pronounce unnecessary product bans and leave the field to worse materials – without affecting the real problems at all!
There would be a number of measures that would make a real difference on a large scale: Plastic waste export bans, landfill bans, mandatory deposit for all plastic bottles for all types of beverages, a ban on the intentional use of microplastics and increased use of high-quality polymers instead of composite systems, as these are easier to recycle (Design for Recycling). Plastic waste could be systematically collected and recycled worldwide. A global standard for the biodegradation of certain polymers could reduce risks in case that leakage into the environment is unavoidable. And finally, a clear concept is needed on how to move from fossil to renewable carbon by 2050. Or would the plastics industry like to be pilloried in 2050 as one of the largest and last emitters of fossil carbon? As an industry of the future? A photovoltaic area of only 1% of that of the Sahara would suffice to supply the entire chemical industry with renewable carbon – via solar hydrogen and CO2 from the air.