Of great value to scientists in this respect were their investigations of photosynthesis processes. 

    It has recently been found that if light of different wavelengths is used to illuminate the plants during photosynthesis, chemically different substances are formed. For instance, illumination with red-yellow rays results in carbohydrates as the main compounds whereas blue rays give proteins.

    It may therefore be expected that in the near future people will be able, with the aid of plants, to obtain the complex organic compounds they need, on a considerable scale. 

   Indeed, instead of building factories, furnishing them with unique equipment and working out complex synthesis technologies, it will only be necessary to build hothouses and to regulate the intensity and spectral composition of the light rays used. 

    Then the plants themselves will make everything required: from the simplest carbohydrates to the most complex proteins.
 

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