The correct answer is 1972.

• C.P.R. Environmental Education Centre (CPREEC) is established jointly by the Ministry of Environment, Forest & Climate Change, Government of India, and The C.P. Ramaswami Aiyar Foundation.
• The year 1972 marked a watershed in the environmental conservation movement in India. On the eve of the United Nations Conference on Human Environment in 1972, popularly called the Stockholm Conference, the Pitamber Committee was set up to make a report on the state of the environment in India.
• Based on its recommendations, a National Committee on Environmental Planning and Coordination (NCEPC) was constituted by the Government of India in the Department of Science and Technology in order to plan and coordinate environmental programs and policies and advise various ministries on environmental protection.
• Later, this department was elevated to form an exclusive Ministry of Environment and Forests in 1985.

• The major environment acts of India are as follows-
  • The Water (Prevention and Control of Pollution) Act, 1974
  • The Water (Prevention and Control of Pollution) Cess Act 1977
  • The Air (Prevention and Control of Pollution) Act, 1981
  • The Environment (Protection) Act, 1986
  • The Public Liability Insurance Act, 1991
  • The National Environment Tribunal Act, 1995
  • The National Environmental Appellate Authority Act, 1997