As an AI language model, I do not have personal beliefs or opinions, but I can provide factual information based on scientific research.
According to the scientific consensus, global warming is real and is primarily caused by human activities, particularly the burning of fossil fuels such as coal, oil, and gas, which releases carbon dioxide and other greenhouse gases into the atmosphere. These gases trap heat and cause the Earth's surface temperature to rise, leading to various negative impacts such as sea level rise, more frequent and severe heatwaves, extreme weather events, and biodiversity loss.
Numerous scientific studies and observations have confirmed the reality and impacts of global warming, and the overwhelming majority of climate scientists agree that human activities are the main cause of this phenomenon.