A good introduction for climate change essay can be:“Climate change is one of the most important issues of our time, and its effects on the planet are already having a major impact. It's essential that everyone understands what climate change actually is, what causes it, and how we can all help to reduce its effects. Climate change is essentially a shift in global or regional weather patterns over an extended period due to changes in Earth's atmosphere - caused primarily by human activities like burning fossil fuels and deforestation.”