摘要：The most significant air pollutants in Austria are the
directly phytotoxic components ozone (O3), nitrogen
oxides (NOx) and - locally - ammonia (NH3) and
hydrogen fluoride (HF). NOx are ozone precursors
enhancing, together with NH3 (NH4
+, respectively), the
eutrophication of ecosystems.
Of special interest are - besides ozone, which is also a
greenhouse gas - indirect effects of the less reactive
greenhouse gases such as carbon dioxide (CO2),
methane (CH4), chlorofluorocarbons (FCKW) and
nitrous oxide (N2O). Global and national trends in the
emission of these components suggest that national
and international air pollution control measures have
been insufficient.
关键词：pollutant emissions, trends, effects on
forests
