Questions

1. The National Green Tribunal banned the use of ‘Chinese’ kite strings, made of nylon or any synthetic material on the grounds that it poses threat to life and environment.

2. The Tribunal directed all state governments to prohibit the “manufacture, sale, storage, purchase and use” of synthetic manja or nylon threads and all other synthetic strings used for flying kites with immediate effect.

3. A bench headed by NGT Chairperson Justice Swatanter Kumar ordered the authorities to ban import of any synthetic manja.

Helioseismology is the study of the solar interior using observations of waves on the Sun's surface. It has done much to improve our understanding of the interior of the Sun, testing the physical inputs used to model stellar interiors and providing a detailed map of the Sun's structure and internal rotation.

The Opium Wars were two wars in the mid-19th century involving Anglo-Chinese disputes over British trade in China and China’s sovereignty. The disputes included the First Opium War (1839–1842) and the Second Opium War (1856–1860).