What is Polyethylene Terephthalate (PET)?

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Why in news?

The researchers developed an integrated reactor with two separate compartments: One for plastic and one for greenhouse gases.
The reactor uses a light absorber based on perovskite – a promising alternative to silicon for next-generation solar cells.
Tests of the reactor under normal temperature and pressure conditions showed the reactor could efficiently convert polyethylene terephthalate (PET) plastic bottles and CO2 into different carbon-based fuels such as CO, syngas or formate, in addition to glycolic acid.
The reactor produced these products at a rate that is also much higher than conventional photocatalytic CO2 reduction processes.

It is a condensation polymer of ethylene glycol and terephthalic acid.
The by-product of the reaction is water so it is an example of condensation or step-growth polymerization.
PET Plastic is a thermoplastic synthetic substance which malleable under heat and can be placed into nearly any shape.

Source: A new reactor powered by the sun can convert plastic, and CO2 into fuel