Scientists have concluded that human activities are affecting the atmosphere and causing rapid climate change on a global scale. Which statement provides the strongest evidence that these changes to global climate are NOT the result of natural causes, such as variations in Earth's orbit? 1 point Until recently, Earth's climate had remained relatively constant. Variations in Earth's orbit cannot be measured precisely. Variations in Earth's orbit would affect climate only minimally. Earth's climate depends mostly on the output of the sun. Variations in Earth's orbit occur gradually over 100,000 years.