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...

The 21st century could see the switch from the fossil fuel to the biological based economy. Agriculture could be rejuvenated as a source of bioenergy and biomaterials, as well as providing food and fibres. The relative costs of fossil fuels and agricultural biomass will clearly play a key role