Water is colourless. But when we observe any large water body, it appears blue. When it has a lot of impurities (or nutrients), it can vary from red, green, white, grey, brown, black to anything that is weird and filthy. Read about some important terms related to different colours of water that we come across in common parlance or which researchers use to understand better this elixir of life. Bluewater: ‘Why is water blue in colour?’—humans must have raised this question since time immemorial. But in 1921, this query was resolved when Sir CV Raman raised and answered it successfully...
World Menstrual Hygiene Day 2023: Small-scale incinerators for sanitary pad disposal in schools is not a good idea. Lack of monitoring and emission of harmful gases like dioxins and furans within poorly designed, substandard toilets are major risks posed by small-scale incinerators. ****************************** The theme of Menstrual Hygiene Day 2023 is to make menstruation a normal fact of life by 2030. The predominant objective is to create a world where no one is held back because they menstruate…
The story of how a village got its first toilet. *********************************** G Nandakumar is a young farmer in Diguvapalem, a remote hamlet and a chronically drought-prone area in southern Andhra. In 2019, I met him on a school hiking trip, as part of our Geography classes. 'Nandu,' fondly addressed as so, was keen to upgrade his village by pursing some sustainable environmental practices, like organic farming. However, he lacked the resources to execute his vision. So, as a young student, I was very inspired by his ideas and wanted to help...