The main reason for the improved quality of surface waters is the reduction in the production volume (the closure of a number of major polluters). The improved air quality is a result of the stepped-up transition to the use of more environment-friendly fuels and heating systems and of the already completed desulphurisation in some thermal power plants.

the physical volume of production sold during the survey period;

the value and/or physical volume of actual production during the survey period with a view to marketing.

the physical volume of actual production during the survey period, including any which is incorporated into the manufacture of other products from the same undertaking;

In making a determination of serious damage, or actual threat thereof, as referred to in paragraph (a) the effect of those imports on the state of the particular industry shall be examined, as reflected in changes in such relevant economic variables as output, productivity, utilization of capacity, inventories, market share, exports, wages, employment, domestic prices, profits and investment.

However, some of the product types sold domestically in sufficient quantities and that were presented as being comparable with product types for which no domestic sales existed were seen to differ substantially both in terms of cost of manufacturing and of their physical characteristics such as weight, size of exits etc. In order for the Commission to be able to use these prices to establish normal value the estimation and application of numerous and significant adjustments would have been required.

the physical volume of production sold during the survey period; (b)