<prompt> Translate the following text to EnglishKwa mujibu wa taarifa ya Ujerumani, idadi kubwa ya viwanda vya kudhibiti SO2 na NOx vilianzishwa katika kipindi cha mapumziko ya chini ya wiki nne.  <response>: Based on experience in Germany in response to a compliance directive, a significant quantity of SO2 and NOX control installations were performed within outage periods consisting of less than four weeks. 