This group of historians and history teachers convened in 2006â2007 to review. the AP U.S. History course and provided recommendations to ensure that the. historical thinking skills, themes, and scope of the course are aligned with the. expectations of college and university survey courses.
Climate change can also be caused by human activities, such as the burning of fossil fuels and the conversion of land for forestry and agriculture. Since the beginning of the Industrial Revolution, these human influences on the climate system have increased substantially.
There are many factors that can cause a warming of our climate; for example, more energy from the sun, large natural events such as El Nino or an increased greenhouse effect. Scientists have ruled out the sun and natural variations in our climate as the major causes of the recent warming.