The students tested by PISA are aged between 15 years and 3 months and 16 years and 2 months at the beginning of the assessment period The school year pupils are in is not taken into consideration Only students at school are tested not home-schoolers In PISA 2006 however several countries also used a grade-based sample of students This made it possible to study how age and school year interact, 13 Growth and organization of the IJA Main articles: Founding of modern Singapore and Singapore in the Straits Settlements; . While the negotiations were ongoing Singapore already prepared for greater water self-sufficiency through an integrated water management approach including water reuse and desalination of seawater In 1998 the government initiated a study the Singapore Water Reclamation Study (NEWater Study) to determine if reclaimed water treated to potable standards was a viable source of water In order to facilitate the new integrated approach the Public Utilities Board which had previously been in charge of water supply only was given the responsibility for sanitation as well in 2001 Previously sanitation had been under the direct responsibility of the Ministry of Environment The new policy was called the "Four Taps": the first and second taps were local water catchments and water imports! 6.9% First programme Singapore business directory. .
Tengah Air Base WSAT TGA Military Paved 8900 2713, (70.2) 20.8 See also: NEWater, (Billion) Avg 5.2 Rankings comparison 2003 - 2015. IB Global Politics Ptolemy's astrological outlook was quite practical: he thought that astrology was like medicine that is conjectural because of the many variable factors to be taken into account: the race country and upbringing of a person affects an individual's personality as much as if not more than the positions of the Sun Moon and planets at the precise moment of their birth so Ptolemy saw astrology as something to be used in life but in no way relied on entirely.
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