With the help of which phenomenon does carbon dioxide keep the earth’s atmosphere warm?

Global warming is the rise in the average temperature of earth's atmosphere and oceans. Warming of the climate system is primarily caused by increasing concentrations of greenhouse gases produced by human activities such as the burning of fossil fuels and deforestation. The heat caused by infrared radiation is absorbed by greenhouse gases such as water vapour, carbon dioxide, ozone and methane which slow its escape from the atmosphere. Although greenhouse gases make up only about 1 percent of the earth's atmosphere, they regulate our climate by trapping heat and holding it in a kind of warm air blanket that surrounds the planet. This phenomenon is what scientists call the greenhouse effect. Without it, scientists estimate that the average temperature on earth would be colder by approximately 30 degrees, far too cold to sustain our current ecosystem.