A salutatorian is a graduate who finished with the second highest rank in his or her class. Only the valedictorian did better. Being the salutatorian of your graduating class is a great honor. Traditionally, the salutatorian gives the opening remarks at the graduation ceremony. So, just as a salutation is a greeting, a salutatorian is responsible for offering a formal greeting at the event. Having been a salutatorian looks great on a resume, as long as you spell it correctly.
Rainwater can be collected from rivers or roofs, and in many places the water collected is redirected to a deep pit (well, shaft, or borehole), a reservoir with percolation, or collected from dew or fog with nets or other tools.
Filtration methods are ways to clean water and are commonly used after sedimentation to further reduce turbidity and remove pathogens. Filtration is a physical process which involves passing water through filter media. Sand and ceramic are the most common filter media, although cloth and membranes can also be used.he best ways to clean water are found in a multi-barrier approach that protects water quality from source to consumption. Note: The content on this page has been adapted from publications of World Health Organization (WHO) and Centre for Affordable Water and Sanitation Technology (CAWST).