The document outlines the historical development of environmental regulations in India and globally, highlighting significant periods and international agreements from pre-1900 to the present day. It discusses roles of key Indian environmental authorities such as the Ministry of Environment and Forests (MoEF), Central Pollution Control Board (CPCB), and State Pollution Control Boards (SPCB) in managing pollution and enforcing regulations. The document also addresses specific environmental issues including air, water, and land pollution, along with relevant legal frameworks and regulatory measures in place to combat these challenges.