What is Global warming, what are the causes of Global warming. It occurs due to greenhouse effect. Gases like Carbon dioxide, ozone, nitrous oxide, methane, water vapor traps the earth’s heat and warms the earth.
With picture of greenhouse effect, it will help you in learning the concept. A detail illustration of carbon dioxide and greenhouse effect is shown from this video.
A 58-minute, illustrated talk describing how and why ozone depletion explains global warming much more directly and much more clearly than greenhouse gases. Greenhouse-gas theory is based on some inaccurate assumptions. See https://whyclimatechanges.com for shorter videos and considerable scientific detail.