The purpose of this test is to determine the effects of a substance on the growth of freshwater microalgae and/or cyanobacteria. Exponentially growing test organisms are exposed to the test substance in batch cultures over a period of normally 72 hours. The system response is the reduction of...

There have been substantial improvements in development outcomes in Afghanistan since 2001, particularly in terms of improved access to basic services such as water, sanitation, and electricity, and increased human development in education and health. However, some gains are now being eroded due...