for example precipitation was lower in than in the previous year but emissions from energy generation continued to decrease in portugal emitted kt of nox and kt of sox per mtoe of tpes compared with the oecd averages of and kt for example the sodium hypochlorite used to prevent algae proliferation in the pipes the pnaee implements the eu directive on energy enduse efficiency and energy services ec this directive contains an indicative national energy savings target of up to to be reached through energy services and other energy efficiency improvement measures in the sectors not covered by the eu ets the eu targets set out in march seek i a reduction in eu ghg emissions of at least below levels ii of eu energy consumption to be provided by renewable energy sources and iii a reduction in primary energy use compared with projected levels to be achieved by improving energy efficiency