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  2. Value-added tax - Wikipedia

    en.wikipedia.org/wiki/Value-added_tax

    The Neumark Report published in 1962 concluded that France's VAT model would be the simplest and most effective indirect tax system. This led to the EEC issuing two VAT directives, adopted in April 1967, providing a blueprint for introducing VAT across the EEC, following which, other member states (initially Belgium, Italy, Luxembourg, the ...

  3. Plastic recycling - Wikipedia

    en.wikipedia.org/wiki/Plastic_recycling

    Globally, this is by far the most common form of recycling and in many countries it is the only type practised. It is the simplest and most economical technique. It has a lower carbon footprint than other processes. [85] However, several factors can reduce output quality, which limits its applicability. [85]

  4. Solar cell - Wikipedia

    en.wikipedia.org/wiki/Solar_cell

    A solar cell or photovoltaic cell (PV cell) is an electronic device that converts the energy of light directly into electricity by means of the photovoltaic effect. [1] It is a form of photoelectric cell, a device whose electrical characteristics (such as current, voltage, or resistance) vary when it is exposed to light.