Figures for Kazakhstan (after 1995), Kyrgyzstan and Tajikistan (both after 1998) include estimates for freight transported by nontransport operators; breaks in trends indicate where measurement methodology changed.
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Did you know that most of oil pollution in our oceans is the result of human activity on land and not tanker spills? If you notice oil leaking from your car, fix it right away! Never dispose of used oil into a storm drain.
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