Question

The earth summit at Rio De Janeiro was held with the theme of
A. Conservation of energy
B. Conservation of forests and biodiversity
C. Saving natural resources
D. Saving animals in wild

Answer 1

Hint: Agenda 21 is a plan of the activities undertaken by the United Nations and is a primary product of the Earth Summit that was held in Rio de Janeiro, Brazil, in 1992. The "21" in Agenda 21 refers to the first 21 centuries where the UN hoped to achieve its development goals of conservation of environmental and biodiversity and natural resources.

Complete answer: The main focus of the Summit was on developing a global framework for addressing environmental degradation through sustainable development.
The issues that were addressed by UNCED were:
1. Protection of air, land, and water; conservation of biological diversity, forests, and natural resources; and sound management of wastes and technology.
2. A systematic review of outlines of production - particularly the manufacture of toxic components, for example, production of lead in gasoline, or production of poisonous waste including radioactive chemicals.
3. Alternative sources of energy that can replace the use of fossil fuels which have a deep link to global climate change. Regarding this, some major decisions were taken such as the Kyoto Protocol, the Paris agreement, etc.
4. The growing usage and limited supply of water.
5. The Convention on Biological Diversity was also a remarkable decision that was taken at the Earth Summit.

So the correct answer is option B. Conservation of forests and biodiversity

Note: The Rio De Janeiro Earth Summit or The United Nations Conference on Environment and Development (UNCED) was held on June 3-14, 1992 in Rio de Janeiro, Brazil.