Chemical Pollution Is a New Problem Created by Humans in the Last

question 60

True/False

Chemical pollution is a new problem created by humans in the last 300 years.

---

Definitions:

Percentage

A portion or share expressed as a fraction of 100, commonly used to compare differences in quantities.

Percentage

A rate, number, or amount in each hundred, represented by the symbol %.

Base

The fundamental component or main ingredient in a mixture, formula, or system.

Decimal Places

The number of digits to the right of the decimal point in a number, significant in precision of measurements and calculations.