Which statements accurately describe isaac newton's achievements?
choose all answers that are correct.
a. his theory of universal gravitation revolutionized astronomy.
b. he invented a new branch of mathematics called geometry. it could be used to calculate the speed, direction, and position of moving bodies like the planets.
c. he discovered white light was made of the many different colors of the spectrum.

Overpopulation puts a tremendous strain on resources. If too many people live in a place with too few resources (food, water, etc.), there are many negative effects. The biggest concern is access to water. A lack of fresh water can lead to unsanitary living conditions, which can cause disease, infection and increased child and infant mortality. Additionally, overpopulation can lead to malnutrition and increased transmission of diseases. Even more disconcerting is the fact that overpopulation is a growing issue; by 2050, the projected population of the world is 9 billion, with the developed world comprising the majority of the population.