1. Amazon rain forests have also been called the lungs of planet Earth.

2. These rain forests of South America are the largest and have the highest diversity of tropical rain forests on our planet.

3. They provide 20% of the total oxygen of our planet.

1. Ronald Reagan, the 40th US President, signed the largest tax cut in his country's history in 1981.

2. This policy focused on the economic theory of Laffer Curve.

3. Laffer curve explains the relationship between tax rate and tax revenue.

1. The Ten Degree Channel separates the Andaman Islands and Nicobar Islands from each other.

2. It is located on the 10-degree line of latitude, north of the equator.

3. Channel is a wide open waterway that passes through two landmasses that are located close to each other.

Other waterways separating the Andaman and Nicobar Islands include.

A. Duncan Waterway: It separates South Andaman and Little Andaman.

B. Grand Channel: It separates Great Nicobar and Sumatra island of Indonesia.

C. Coco Strait: It separates North Andaman and Coco Islands of Myanmar.

1. The Constitution of the World Health Organization (WHO) came into force on April 7, 1948.

2. Significance: This day is now celebrated every year as World Health Day.

3. Objective: To make people aware of the importance of health and encourage them to adopt a healthy lifestyle.

4. Function: The World Health Organization is an international organization that promotes health and improves the health of people around the world.