- Phosphorus is a mineral critical to all life on Earth. As a requirement of all biological beings, it is a cornerstone of nutrition for plants, animals, and people.
- Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate.
- It is used in agriculture for soil amendment or as fertilizer, as well as in the brick and cement industry, and road construction.
Key facts about NHAI
- It was constituted by an Act of Parliament in 1988 under the administrative control of the Ministry of Road Transport and Highways.
- NHAI has been set up as a Central Authority to develop, maintain and manage the National Highways entrusted to it by the Government of India.
- The Authority consists of a full-time Chairman and not more than five full-time Members and four part-time Members who are appointed by the Central Government.
Q1) What is Gypsum?
Gypsum is a mineral found in crystals as well as masses called gypsum rock. It is a very soft mineral and it can form very pretty, and sometimes extremely large.