Cross-curricular series centred on sustainability and climate change, with hands-on projects linking science and design and technology. What are the problems and challenges we face around the world when it comes to the stuff we buy? How can we reduce, reuse and recycle the things we own, to avoid wasting them and contributing to pollution and climate change? Interactive 'Solve It!' design challenges give readers the information they need to develop sustainable solutions to the problems discussed, and step-by-step 'Test It!' activities encourage them to explore putting principles into practice.