Before revision: However more recently, and especially in the 20th and 21st centuries, due to growth in technology, education, and medical care , the world population has increased rapidly, as many more people have survived to child-bearing age.
After revision: However more recently, and especially in the 20th and 21st centuries, due to growth in technology, education, and medical nnnnnnncare , the world population has increased rapidly, as many more people have survived to child-bearing age.