what is the percentage of carbon dioxide in the atmosphere

Carbon dioxide occurs naturally in small amounts in the Earths atmosphere. According to the search results, the percentage of carbon dioxide in the atmosphere is currently at nearly 412 parts per million (ppm) and rising, which represents a 47 percent increase since the beginning of the Industrial Age, when the concentration was near 280 ppm, and an 11 percent increase since 2000, when it was near 370 ppm. Carbon dioxide makes up only about 0.04% of the atmosphere. However, despite its small percentage, carbon dioxide has a significant impact on global warming because of its ability to absorb heat emitted from the Earths surface, keeping it from escaping out to space.