Topic B6: Global challenges

Topic B6: Global challenges explores the impact of human activities on the environment and the strategies we can use to achieve sustainability. This topic covers key issues such as climate change, biodiversity loss, pollution, and the management of natural resources. You will learn about the greenhouse effect, the carbon cycle, and how human actions like deforestation and burning fossil fuels disrupt these natural processes. Understanding these challenges is crucial because they affect every living organism on Earth, and as future scientists, you will play a role in finding solutions.

This topic also delves into the importance of maintaining biodiversity and the methods used to conserve species and habitats. You will study the role of biotechnology in addressing global challenges, including genetic modification to improve crop yields and reduce pesticide use. Additionally, the topic covers the principles of sustainable development, such as reducing waste, recycling, and using renewable energy sources. By the end of this topic, you should be able to evaluate the pros and cons of different strategies and make informed decisions about environmental issues.

Topic B6 builds on your knowledge of ecosystems, photosynthesis, and respiration from earlier topics. It connects biology to real-world problems and highlights the interdisciplinary nature of science. You will apply your understanding of food chains, nutrient cycles, and evolution to explain how human activities threaten ecosystems and what can be done to mitigate these threats. This topic is not only examinable but also essential for becoming a responsible global citizen.