Consider the following statements and choose the correct option.
• The world's first anti-dam movement took place in the 1980s to save Australia's Franklin River and the forests around it.
• Hole in the ozone layer is a big threat to human health.
• The main concern of the northern countries was not about the hole in the ozone layer and global warming.
• Development modalities were suggested as “Agenda 21” in the Rio Conference (Earth Summit).
Choose the correct answer from the options given below: