The document discusses various aspects of the natural environment and environmental issues. It covers topics like global warming, greenhouse effect, greenhouse gases, major agreements like the Kyoto Protocol and Paris Agreement. It also discusses different types of pollution like air, water and land pollution. Key terms related to the environment are explained such as carbon credits, carbon offsetting, carbon tax, carbon footprint, carbon sinks and carbon dieting. Ways to reduce carbon footprint and impact of environment on business are also mentioned.