Steep concentration increases of atmospheric greenhouse gases, including CO₂, cause global warming and consequently change rainfall patterns; such processes are commonly referred to as climate change. Because all environmental factors involved are essential drivers for plant growth, these changes will significantly impact crop production. Weeds – plants associated with crops ‘whose virtues have yet to be discovered’ – will also be affected by changes in atmospheric CO₂ and climate. How single environmental factors affect individual plant species is known or otherwise relatively easy to study. Combined effects of these environmental factors on weed communities – comprising multiple species – are subjected to much greater uncertainty and are more complicated to study. Understanding how this, in turn, will alter weed invasiveness and competitiveness with crops – impacting future food production – is the real challenge, in particular against the background of contradictory climate change scenarios. This book, written by two renowned experts, eloquently deals with such questions. With 11 well-illustrated and well-structured chapters about invasiveness, biology, management and even benefits of weeds, and how these could be impacted by changes in CO₂ and climate, the authors have produced a comprehensive, reader-friendly and insightful book. One of the main conclusions is that weeds will benefit more than crops from changing environmental conditions because of their greater adaptive capacities resulting from species diversity and higher genetic variation within individual species. The authors encourage weed scientists to raise awareness of the likely far-reaching implications of this conclusion by publicising real-world examples of socio-economic importance. A must read for all scholars interested in plant and weed ecology.