Particulate Matter (PM2.5) Mega Guide

In this article, you will find information about everything related to particulate matter. I will focus on PM2.5 as I believe it is the most universal indicator of air quality. Almost all scientific studies concentrate their attention to PM2.5 because there is a substantial availability of monitors/sensors. Some extracts were taken from my book See The Air – PROOF THAT AIR POLLUTION KILLS.

1) What is PM2.5?

Scientific explanation: PM2.5 is a mass concentration on basis of a separation curve, where the 50% value is at 2.5μm aerodynamic diameter. More precisely, the weighting function is much steeper (100% weighting <0.5μm, to 0% weighting> 3.5μm and 50% weighting at approximately 2.5μm). PM2.5 pollution can only be seen with an electron microscope.

Plain English explanation: PM2.5 referees to fine particles with a size of or less than 2.5μm (aka micron). By the way, soot, aerosols, dust, BC are other common terms to call particle pollution.

2) What is PM2.5 made of?

It is hard to determine a specific chemical composition, however, here is a list of all the chemicals that might be found in a single particle. Polycyclic aromatic hydrocarbons (naphthalene, acenaphthylene acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a) pyrene, dibenzo(a,h)anthracene, benzo(g,h,i)perylene, and indene), metals (Al, Si, P, S, CI, K, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Ca), others.

Read More »

Review: Mila Air Purifier by Mila Cares

Indoor air purification made affordable!? If you see the competition out there, you will notice that some air purifiers are crazy expensive. Sometimes justified, but most of the time not so much. The problem is that in a modern household we want smart devices that will manage stuff for us automatically and intelligently. Here comes Mila Air, an air purifier for the modern ages in an affordable package.

Mila Air by Mila Cares uses proven techniques to remove air pollutants from your indoor environment such as filters with HEPA H12 or H13 or H14, among others. You choose which one is the best for you. There are many other filter combinations that are ingenuously described by the company in order to make the product more accessible to the everyday folks that want to improve indoor air quality and aren’t experts in the field.

Read More »

Los Libros de Nicholas ahora están disponible en Español – Nicholas’ books are available in Spanish

Los libros de Nicholas ahora están disponible en Español gracias a la colaboración con el Instituto Universitario de Medio Ambiente y Grupo de investigación Química Analítica Aplicada de la Universidade da Coruña. 

La educación ambiental de los niños es muy importante para poder promover la conciencia ecológica y el cuidado del ambiente en la ciudadanía. El aire puro que necesitamos para respirar y vivir es un derecho humano. La ONU calcula que aproximadamente 7 millones de personas mueren cada año de forma prematura debido a la contaminación del aire. Ademas un 90% de la población mundial respira aire contaminado.

Los libros van a estar disponibles en varias bibliotecas en Galicia (España) pero también están disponible en Amazon.

OPEN Ambient Air Quality DATA

There is some serious competition in the market of environmental monitoring and particularly in air quality. There are a lot of ambient air quality monitors available with great features and great sensors, the problem is that society doesn’t benefit from the variability of monitors because AQ data are scattered in different platforms/maps. It is hard for end-users and citizens to find which monitor is active and where (especially if you move). Someone needs to gather low-cost AQ data from everywhere and offer it to users in easy service.

Last year, on my trip across Europe, I monitored air quality with a portable monitor, but I wanted to compare the data I got against the official or other low-cost monitors out there. It was impossible!

The openaq team is doing just that. They are gathering data from official and low-cost sensors (stationary and mobile). Unfortunately, even today I cannot access data from specific low-cost monitors that take advantage of the API and their open map.

This are the brands that collaborate and they provide data to openaq:

Read More »

Review: Senstate Urban Air Quality Station

I was given the chance to review an air quality monitor from a European company that is located in one of the most contaminated countries with the highest concentrations of particulate matter − the notorious pollutant which causes premature deaths and many illnesses.

Each year during the cold winter months, Bulgaria has the highest PM2.5 concentrations of all EU-28 member states in urban areas (I have the chance to experience it in person in Sofia). The reason is wood and coal burning. Senstate Technologies SC is a Bulgarian company with experience in the field of environmental issues.

The Senstate Urban Air Quality Station is a versatile and configurable air quality monitor with cutting-edge technologies on board, I will give you more information about it in a hot minute.

Read More »

Office Study – Tapping Into The Real World Air Quality Data

Nowadays, it is a privilege to have access to a real indoor environment where you can measure and quantify indoor environmental quality (IEQ). It is not an easy task because most companies keep AQ data private, and we totally respect that. However, sometimes tapping into the real world data is fundamental in order to understand the conditions white color employees and employers work in an effort to improve work conditions and productivity.

The owner of the building and the office granted me access to installing the Atmocube IAQ monitor for two months, in order to figure out what improvements shall apply in their effort to mitigate covid19, improve working conditions and boost productivity. The office is located in Almeria, Spain which is a coastal city.

They don’t have any mechanical ventilation systems, so the indoor conditions were subject to their human actions and whether they opened the windows/doors or not.

Read More »

Review: SODAQ AIR – An Air Quality Monitor for Your Bike/Your Lungs

More and more people choose to ride a bike for their daily commutes and although SODAQ AIR is not the first air quality monitor for a bike, it is the first to have collected over 20M data points. This is particularly import for the development of an IoT air quality monitor as the developers have enough information to debug and develop a super stable product that needs very little troubleshooting from its users.

SODAQ is not a new company as it was founded back in 2013, and they have been working on this particular project (SODAQ AIR) alone since 2015. It seems that consumer satisfaction is always their priority, which is very important nowadays as we need sustainable products that will last for a long time.

Read More »

Review: AIRINUM URABN AIR MASK 2.0

Last year, I reviewed the AIRINUM Lite Air Mask and I was really pleased with the comfortability and efficiency during my daily commutes. The same company has developed a higher-end model called URABN AIR MASK 2.0. In my opinion, this mask has been given much more attention to the details. From the packaging to the mask itself.

The AIRINUM URABN AIR MASK 2.0 offers great protection from particulate matter. I have been wearing the Onyx Black for four weeks already.

Filtration

It employs the same technology as the Lite Air Mask with a multi-layer filter which is tested at the Research Institutes of Sweden (RISE) with results showing 98% filtering efficiency against particles down to 0.3μm in size. The size of the filter is bigger though. You will find the full lab results here. The five-layer filter can last up to a month of usage, but as always keep it away from very humid environments and procure to disinfect the inner filter layer with sprayed alcohol to prevent bacteria growth. The mask is washable and treated with Polygiene®.

Read More »

Two Major Sources of Air Pollution in Cities that We Have to Address Today!

Ambient air pollution is the world’s top driver of illness and death from chronic diseases like heart disease, stroke, cancer, diabetes and chronic lung disease.

According to WHO, ambient air pollution is the cause of almost 30% of all deaths and disease from lung cancer. Furthermore, polluted air is responsible for 24% of all deaths from stroke and 25% of all deaths and disease from ischaemic heart disease. Finally, it attributes to 43% of all deaths and disease from chronic obstructive pulmonary disease (COPD). Noncommunicable diseases (NCDs) are linked to low-income communities.

Which are the top 2 sources of Air Pollution in cities in 2022?

Wood and biomass burning

Yes, that’s right the “cozy” wood stoves that most people love and brag about are the number one sources of air pollution in cities all around the world. The population on earth takes turns each year, during the 6 cold months in the northern hemisphere and the other 6 months in the southern hemisphere. All wood-burning stoves are very dirty, it doesn’t matter if they are old fireplaces, EPA certified, or pellet stoves. They all emit a tremendous amount of particulate matter which is responsible for all the illnesses and deaths I have mentioned above.

Read More »

2021: Year in Review – See The Air

One more year has passed, one more orbit around the Sun, but still in many places of the world air pollution remains the number one threat for the health of the dwellers and the stability of the ecosystem. The political unwillingness to address air pollution and lots of green-washing from companies haven’t alleviated the situation anywhere. Sad, but even the COP26 was a bit of a fiasco as the leaders of this planet and the majority of the population are still trying to process the information of climate change and air pollution. Apparently, the world doesn’t want to sacrifice convince over the quality of life and life expectancy.

Megalomania and individualism are tearing the ecosystem apart and polarizing the society into left or right, pro-climate or anti-climate, pro-clean air (anapneism), or burn as much fossil fuel, waste and wood as possible. Plastic pollution is another big issue as well.

Read More »