What is the fine-grained topic of the following text: Based on the principles of sustainable development, food security and sovereignty, strengthening social ties and cooperation, as well as refocusing on local, healthy and well-balanced food, the experiments in alternative consumption, self-production, sharing, recycling and simple living are at the heart of a socio-political construction centred on satisfying needs, happiness, prosperity, redistribution, pooling resources at the global level, environmental protection and social justice. Only return the topic.
Principles and experiments in sustainable living and consumption for socio-political construction and environmental protection.