Some 15 to 30 per cent of our children and youth are at risk of failing in school where learning and behaviour problems touch ever younger children. In many countries with very different political and cultural backgrounds, these challenges are being met by increasing the co-ordination of...

This Test Guideline is designed to assess the effects of prolonged exposure to chemicals on the growth of juvenile fish. Juvenile fish in exponential growth phase are placed, after being weighed, in test chambers and are normally exposed to five sublethal concentrations of the test substance...