In the political debate on climate change it has been suggested that packaging materials derived from fossil reserves, like plastic polymers, should be restricted and phased out as they contribute to increased concentration of carbon dioxide when incinerated after use. Plastics is derived from the very small (4%) portion of crude oil in the refinery process, and is a by-product, ethane, which otherwise is burnt with a flame in the process.
As an alternative some opinion formers suggests that bio based polymers should be promoted and replace traditional fossil based plastic packaging. Plastic packaging is essential in most distribution systems and we would not be able to feed the world population without it.
When more than 50% of the individuals on the globe are living in urban areas and cities without the possibility to grow their own food, packaging is the solution. But bio based polymers may not be the solution. Extensive land use, fresh water supply and use of artificial fertilizers will raise questions. Competition with food production or bio-based fuel may also be an issue.
In addition it may also interfere with objectives on biodiversity. The way out of this dilemma is maybe controversial, but plastic packaging should not be incinerated after use, not even for energy recovery. Recycling is the first option but with restrictions on quality of recycled material (strict food contact requirements) and unfortunately often with a negative cost/value equation.
Used plastic packaging with no option for an effective recycling should therefore be landfilled – well managed and controlled. This will prohibit carbon dioxide emissions and actually serve as a carbon sink. Collected and used plastic packaging will bring back the fossil carbon into the earth’s crust and will avoid impact on climate change.
We have to realize that "Plastics to Fuel" is an old fashion concept that does not meet the objective to reduce carbon emissions - the hot topic of today.
Energy should be produced from renewable resources, and the sustainable concept for used fossil plastics is “Carbon Capture”. To bring back fossil carbon to the earth’s crust after a valuable contribution in the distribution system is a sustainable story. Circularity for used plastic packaging when the value/cost equation of recycling is positive, but Carbon Capture when the equation is negative. Energy recovery is better than just incineration, but still with carbon emissions and impact on climate change.