The tag has no usage guidance.

learn more… | top users | synonyms

10
votes
1answer
2k views

Can the oxygen levels in a polluted city be as low as 11%? [closed]

Normal levels of oxygen in atmosphere is around 21%. Recently in a discussion somebody commented that the polluted cities like Delhi has only 11% of oxygen in its atmosphere on some peak days of ...
9
votes
2answers
2k views

What was the density of prehistoric Earth atmosphere (dinosaurs buoyancy theory)

There is a site by David Esker named Dinosaur Theory: dinosaurtheory.com. David says that dinosaurs was so big because the early (at dinosaurs age) earth atmosphere was very dense and most mass of ...
3
votes
0answers
349 views

Is typical indoor concentration of VOC correlated to concentration of CO₂?

A vendor of VOC (Volatile Organic Compound) sensor claims the VOC concentration correlates highly to CO₂ concentration in a typical conference room: Figure 2 illustrates the correlation of true CO₂...
9
votes
1answer
7k views

Do air ionizers have any substantial benefits or risks?

This question regarding an ionizer in an Asus laptop has a little bit of information about air ionizers (air ionisers for those using UK English), but not a lot at the time of writing. There are ...