Pollution can take many forms, some are easily noticed such as certain forms of contaminated water, poor air quality, industrial waste, litter, light, heat and noise. The sources and types of pollution are highly diverse, as are the solutions to deal with them. The objective of LESER group is to build up a society based on green energy, pure water, fresh air and sustainable resource at low cost and maintenance using green materials. Sustainable development is the integrity of the multidiscipline concept combining ecological, social, and economic aspects to construct a liveable human living system and can be supported through the development of green materials. The research hotspot of environmental protection has gradually shifted from the well-known conventional technologies to eco-friendly, cost-effective, and sustainable technologies, also known as green technologies could demonstrate outstanding advantages. Several experimental treatment processes have been proposed and applied in practice; however, green technologies are currently the most attractive for pollution control, especially water and wastewater remediation, preventing air pollution, and the development of sophisticated yet usable on-site sensors and analytical instruments. In the context of environmental protection, LESER group’s work is a collection of practical methodologies, techniques, technologies, and materials that are based on non-toxic chemical processes, non-toxic end products, renewable energy sources, and environmental monitoring instruments, among other things, to mitigate or correct the negative impact caused by human activities.