Why would increased levels of greenhouse gases contribute to higher temperatures on earth

Explanation:

According to Australian Academy of science ,the enhanced greenhouse effect and climate change. the disruption to earth's climate equilibrium caused by the increased concentration of greenhouse gases has led to an increase in the global average surface temperature . The process is called the enhanced greenhouse effect. Greenhouse gasses prevent heat which is received from the sun from being radiated out into space.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.