I think most of us would agree that climate changes, but only the brain-addled liberal loons believe that the acts of human beings have any impact on it.
Human activity can affect local climate. For example, it is well documented that large cities are warmer (particularly at night) than undeveloped countryside because of the urban heat island effect. Materials that are commonly used in urban areas for pavement and roofs, such as concrete and asphalt, retain and radiate more heat.
Cumulatively, all human activity might have a negligible effect on global climate, but various cycles in that big burning ball in the sky have a much, much greater effect.