A. The Population Bomb - P. Ehrlich (III):
-."The Population Bomb" is a book written by Paul R. Ehrlich. It was published in 1968 and became a significant work in the field of environmental science.

B. Human Development Report - UNDP (IV):
- The Human Development Report is an annual publication produced by the United Nations Development Programme (UNDP).
- The report focuses on various aspects of human development, including education, health, income, gender equality, and more. It provides a comprehensive analysis of human well-being and development progress globally.
 

C. Our Common Future - Brundtland Report (I):
- "Our Common Future" is the informal name for the report of the World Commission on Environment and Development (WCED) released in 1987.
- The report was chaired by Gro Harlem Brundtland, a former Prime Minister of Norway, and therefore is commonly referred to as the "Brundtland Report."
 

D. The Limits to Growth - Meadows and others (II):
- "The Limits to Growth" is a book published in 1972 and authored by a team of researchers, including Donella H. Meadows, Dennis L. Meadows, Jørgen Randers, and William W. Behrens III.
 

So, the correct answer is 2. A-III, B-IV, C-I, D-II.