Climatologists seek to understand three main aspects of climate. The first aspect is the weather patterns that govern normal conditions in different regions throughout the world. Secondly, climate scientists try to understand the relationship between different aspects of weather such as temperature and sunlight. The third aspect of climate that climatologists investigate is the way that weather changes over time. Results from this type of research have shown that human activities are affecting Earth’s overall climate, such as with increased global temperatures. As a result, climatologists also study human causes of climate change; they are particularly interested in activities that release greenhouse gases and their link to global warming.