Lindane is sometimes used as a secondary treatment for a defined group of people.
The proportion of waste water subject to secondary treatment has increased significantly from 26% between 1998-1999 to 82% in the 2004-2005 period.
The provision of secondary treatment with nutrient reduction continues to increase.
This is a preliminary treatment used in preparation for other secondary treatments.
It was also agreed that sewage dumped in certain "sensitive" areas of the sea would be given secondary treatment.
In 2004, this percentage was 63% (including primary and secondary treatment).
However, the availability of synthetic growth hormone, which has fewer side effects, makes this a secondary treatment.
The exception would be in secondary treatment (or side processing) phases.
Even using secondary treatment, water quality can be improved.
Ferry helped her onto the emergency table, signaled a clone from secondary treatment to come in and help.
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