To make a PPP adjustment for comparing GDP we build a basket of comparable goods and services and look at the prices of that basket in different countries. Purchasing Power Parity is the exchange rate needed for say $100 to buy the same quantity of products in each country.
        
                    
             
        
        
        
Answer:
The Columbian exchanged fostered massive changes in both the Americas and Europe.
For the Americas, the first, and most radical change was the decimation of the Native American population, due to the spread of diseases of Eurasian origin, such as measles and syphillis, for which the Native Americans did not have any defenses. According to some historians, the spread of this diseases killed up to 95% of the pre-columbian Native American population.
The second change is related to the first, and was the immigration of many Europeans to the Americas: Spaniards to Spanish Latin America, Portuguese to Portuguese Latin America, and so on.
A third change came from the introduction of Eurasian goods: from horses, to cows, to apples, to rice and wheat. This changed the lifestyle and diet of even Native Americans. For example, Native Americans in the United States adapted to the use of horses, which became a crucial part of their culture.
 
        
             
        
        
        
Good question, thanks for improving my knowledge.
Rahil azam,,,,India
 
        
             
        
        
        
Long before europeans has devised a leap day, mayans knew that a year on earth was longer than 365 days.
the mayans knew about the sun because they're considered one of the most advanced tribe back then. Their culture studied the sun a lot, including the seasons that may have passed during the rise and fall of the sun
        
                    
             
        
        
        
Answer: They used the excuse that since Hitler made girls wear skirts that were longer that made him a religious person.