Environment from A to Z, from Air to Zero waste—Third part

I have started a small series “Environment from A to Z, from Air to Zero waste.” The world we live in is unique as far as we know and so we should strive to preserve this one world. The first two parts can be found here: https://doi.org/10.1002/clen.202370013 and https://doi.org/10.1002/clen.202300181 L for Landfill. A landfill is problematic because the environment has to deal with leachate from it. This leachate is one of the most difficult wastewaters to treat since it varies in composition depending on the age of the landfill. However, a landfill can be also seen as a resource for precious metals and/or other raw materials. See https://doi.org/10.1002/clen.201400510, https://doi.org/10.1002/clen.202000395, and more to be published soon. M for Monitoring in the field of environment. With an increasing urgency regarding climate or climate change issues, we really need evidence of the changes in the parameters. If we do not have enough data to determine the quality of air, water and soils, we lack the basis for taking action for clean air, pure water, and good soil quality – and thus also for the health of all of us. See the Editorial: https://doi.org/10.1002/clen.202200341 and check out for papers: https://doi.org/10.1002/clen.202300122, https://doi.org/10.1002/clen.202000391, and many more. N for Nanoparticles, prepared for the use in water treatment, for photocatalysis, for extraction purposes, and many more applications. On the one hand they are very useful, but on the other hand they are also harmful to the environment. This is the case, for example, when they end up in water bodies or in the form of micro- and nanoplastics in soil and air. Or let's think of food, when nanofertilizers or nanopesticides are used or when nanoparticles accumulate in plants after irrigation with treated wastewater. Please read: https://doi.org/10.1002/clen.202100305, https://doi.org/10.1002/clen.202200229, https://doi.org/10.1002/clen.202100420, and others. O for Oil pollution, may it be of water or soils, is a huge environmental problem. Usually, physical, chemical and biological treatment technologies are used to tackle this problem. Biodegradation is one of these treatment options, other possible ways are the washing of soils or using sorbents in water to bind oil. See for example: https://doi.org/10.1002/clen.202000440, https://doi.org/10.1002/clen.202200207 P for Particulate matter, PM2.5 to PM10, particles with the size of 2.5–10 µm, are toxic air pollutants consisting of solid and liquid droplets that can be inhaled and are thus harmful to humans. Emissions from combustion processes, such as vehicles, excluding electric vehicles, industrial plants, wood fires, volcanoes, or emissions coming from construction sites or dust storms fall under the term particulate matter. On a global scale, particulate matter emissions have increased over the years with ever growing industry and mobility. Solutions to address this problem are urgently needed, and air-focused scientists are exploring various options such as urban greening, industrial filters, and more. Have a look at: https://doi.org/10.1002/clen.202200222, https://doi.org/10.1002/clen.202100184, https://doi.org/10.1002/clen.202100391, etc. CLEAN covers all aspects of sustainability and environmental safety including those mentioned here under the letters L to P. Do you have submissions that address environmental sustainability issues such as air pollution, waste management, water cycle and environmental protection? I look forward to receiving your submission in CLEAN. More on the letters Q through U in the next editorial. Stay healthy. Yours sincerely, Prisca M. Henheik