? What is the climate change

 Climate change refers to a change in the state of the climate that can be identified (e.g. using statistical tests) by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. It refers to any change in climate over time, whether due to natural variability or as a result of human activity. Greenhouse gases are assumed to drive much of the contemporary climate change, and global atmospheric CO₂ concentration is the primary indicator of greenhouse gases,as well as a primary regulator of global climate