Final answer:
An increase in carbon dioxide concentration in the atmosphere leads to global warming.
Step-by-step explanation:
The word that completes the sentence is warming.
An increase in carbon dioxide concentration in the atmosphere leads to a greenhouse effect. Carbon dioxide acts as a greenhouse gas, trapping heat in the atmosphere. This leads to the phenomenon known as global warming, which refers to the increase in the average temperature of the Earth's surface.
For example, the burning of fossil fuels releases carbon dioxide into the atmosphere, contributing to the greenhouse effect and ultimately causing an increase in global temperatures. This has significant impacts on climate patterns, biodiversity, and the overall health of ecosystems.
Learn more about Global warming