INTRODUCTION: Warming of the climate system is unequivocal, as is now evident from the observations of increases in global average air & ocean temperatures, widespread melting of snow & ice & rising of global average sea levels according to UN Intergovernmental Panel on Climate Change. The impact of global warming on the common masses & its awareness is a controversial issue, hence a study was undertaken to assess the awareness of global warming & related behaviour among the students of Mangalore. AIMS & OBJECTIVES: To assess the awareness regarding climate change and its health hazards among the college students of Mangalore.MATERIALS AND METHODS: A Cross sectional Observational Study was conducted in the community with the sampling unit being college students and a sample size of 400. Convenient sampling was done for the sampling unit, 10% of the colleges were chosen based on the thumb rule, using simple random sampling. The study was conducted for over a period of 3 months. A pretested proforma was prepared which was validated for face validity and tested for reliability by conducting a pilot study and the validated questionnaires were used to collect data after obtaining consent by explaining the terms of the study and confidentiality was maintained. The questionnaire was a semi- structured self-administered questionnaire with multiple choice questions, ranking questions, multiple answer questions and a few open ended questions for in-depth qualitative analysis. Proper instructions were given for each question. The questionnaire would test the cognitive, affective and psychomotor domain of the student with regard to global warming. Statistical Analysis was performed using SPSS Version 17.0. RESULTS: Majority (80.5%) considered global warming as an issue of major concern. Around (18.8%) considered global warming as a national problem. Burning of fossil fuel being a major threat for global warming, was not ranked high by majority of the students. Contributing factors for global warming phenomena wasn't known by 23% of the students. Majority (40.2%) believed that it does affect human health. Around 90% had a positive attitude towards the prevention of global warming. Around 26% of the students were confused regarding the methods for halting global warming.Less than 50% of the students were willing to contribute through one or the other means of stopping global warming. Only around 50% of the students were ready to convey the message to others.