Post-glacial rebound actually . Climate Change can be caused by natural processes like volcanic eruptions, variations in the sun’s intensity, or very slow changes in ocean circulation or land surfaces which occur on time scales of decades, centuries or longer.
But humans also cause climates to change by releasing greenhouse gases and aerosols into the atmosphere, by changing land surfaces, and by depleting the stratospheric ozone layer. Both natural and human factors that can cause climate change are called ‘climate forcings’, since they push, or ‘force’ the’ climate to shift to new values.