Amal Hmaissia, Younes Bareha, Céline Vaneeckhaute
Correlations and impact of anaerobic digestion operating parameters on the start-up duration: Database construction for robust start-up guidelines
Journal of environmental management
review describes current patterns longterm trends 50 years possible related physical activity b employment occupation c travel behavior land use e related behaviors eg television watching basis available data following trends observed according type physical activity relatively stable slightly increasing levels leisuretime physical activity declining workrelated activity declining transportation activity declining activity home increasing sedentary activity result overall trend declining total physical activity large differences noted rates walking transportation across metropolitan statistical areas strong linear increase existed vehicle miles traveled per person past half century coupled strong consistent trend toward americans living suburbs although difficult precisely quantify owing lack longterm data apparent combination changes built environment increases proportion population engaging sedentary activities put majority american population high risk physical inactivity