Explore the critical topic of climate change in this comprehensive 39-minute lecture by Dr. Peter H. Hildebrand from NASA's Goddard Space Flight Center. Delve into the science behind climate change, examining evidence from ice cores and Milankovitch cycles. Analyze temperature trends, Arctic sea ice decline, and potential future scenarios. Investigate the impacts on Antarctica, rainfall patterns, and global circulation. Learn about the role of the National Weather Service and the effects on drought, snow cover, and summer stream flow. Examine the consequences for ecosystems and human populations. Understand greenhouse gases, ozone depletion, and the importance of climate models. Discuss tipping points, potential solutions like clean energy, and address climate change opposition. Gain insights into global temperature trends and the significance of international agreements like the Montreal Protocol.