Watch the video and fill in the gaps using the words form the list.

Human activities from ... to overpopulating are driving up the Earth’s temperature and fundamentally changing the world around us. The main cause is a phenomenon known as the ... . Gases in the atmosphere, such as ... , carbon dioxide, methane, nitrogen oxide, and chlorofluorocarbons let the sunlight in, but keep some of the ... from escaping like the glass walls of a greenhouse. The more greenhouse gases in the atmosphere, the more heat gets ... , strengthening the greenhouse effect and increasing the Earth’s temperature. Human activities, like the burning of ... have increased the amount of CO2 in the atmosphere by more than a third since the Industrial Revolution. The rapid ... in the greenhouse gases in the atmosphere has warmed the planet at an alarming rate. While Earth’s climate has fluctuated in the past, atmospheric carbon dioxide hasn’t reached today’s levels in hundreds of thousands of years. Climate change has consequences for our ... , our ... , our food ... and our ... .