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You may have seen the term PM2.5 in weather apps or air quality reports and wondered what it actually means. While the name sounds technical, the idea behind it is simple and important. PM2.5 refers to extremely tiny particles in the air that are smaller than 2.5 micrometres. These particles are so small that they are invisible to the naked…

When people think about pollution, they usually think of traffic, construction, or smog hanging over the city skyline. What many people do not realise is that the air inside our homes can sometimes be more polluted than the air outside. We spend most of our lives indoors. At home, at work, in schools, in gyms, and in shopping centres. Studies…