Category: News

What does V mean in numbers?

here are the commonly used Roman numerals: I = 1. L = 50 M = 1000. V = 5. Does v mean 4? So the Romans moved on to the symbol for 5 - V. Placing I in fron...

Can air purifiers remove CO2?

No. They do not remove carbon dioxide (CO2). Almost all air purifiers are designed to capture some combination of particles and toxic gasses, but CO2 can&...