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.
None of these sudden global climate changes could possibly have been caused by human CO2 input to the atmosphere because they all took place long before anthropogenic CO2 emissions began. The cause of the ten earlier 'natural' climate changes was most likely the same as the cause of global warming from 1977 to 1998...