The main objective of this research is to identify "The effectiveness of short videos (Reels) on social media in raising awareness of climate change". This research uses a quantitative descriptive analysis methodology through a questionnaire to collect data, and it was conducted on (400) respondents from both Gen-Z and Millennial who are living in Egypt. The researcher depended on media dependency theory in the theoretical framework in addition to proposing a scale for measuring the richness of climate change reels on social media regarding Media Richness Theory. Results showed that the medium richness factors got the highest rank (89.4%) in terms of the richness factors in climate change reels, followed by the richness factors related to the presenter (84.2%). The results also revealed that exposure density to climate change reels on social media is positively related to raising awareness of climate change issues. And there is a correlation between the richness of climate change reels on social media and raising awareness of climate change issues.