One of the drivers of the climate system is the greenhouse effect. Greenhouse effect is a natural phenomenon. Life on earth is made possible by energy from the sun, which arrives mainly in the form of visible light. About 30% of sunlight is scattered back into space by the outer atmosphere, but the rest reaches the earth's surface, which reflects it in the form of a calmer, more slow-moving type of energy called infrared radiation. Some of the infrared radiation passes through the atmosphere but most is absorbed and re-emitted in all directions by greenhouse gases such as H2O, CO2, CH4, N2O, CFC, HFC, HCFC, SF6, etc.
Greenhouse gases make up only about 1% of the atmosphere, but they act like a blanket around the earth, or like the glass roof of a greenhouse: they trap heat and keep the planet some 30° C warmer than it would be otherwise.
The problem is not the greenhouse effect; the problem is the additional greenhouse effect due to greenhouse gas emissions from human activities. Our "way of life" implies greenhouse gas emissions everywhere, and the inevitable consequence is the disturbance of the climate system: the "climate change".