Global warming, which is the increase in the average temperature of the Earth's surface due to the release of greenhouse gases into the atmosphere, is only one cause (albeit a major one) of climate change.
Climate change is the statistical change in weather patterns on Earth that last for an extended period of time (at least decades long). Other potential causes include:
However, global warming due to human interaction has led to a much more significant change in Earth's climate since the middle of the 20th century.