Explore the potential of bioengineering to address critical environmental challenges in this thought-provoking lecture by Ricard Solé from Universitat Pompeu Fabra Barcelona. Delve into innovative strategies for using synthetic biology to modify existing communities and ecosystems as a scalable approach to prevent ecological tipping points. Examine the complexities of intervening at multiple scales, from gene circuits to entire communities, and the need for new theoretical frameworks. Investigate potential applications for protecting drylands from desertification, tackling marine plastic pollution, and regulating carbon dioxide levels. Consider the implications, challenges, and ethical considerations of bioengineering approaches in ecosystem management and climate change mitigation.