Which is not a greenhouse gas and therefore not responsible for global warming? A: c02
B: Methane
C: Nitrogen
D: Water Vapor

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Which of the following best describes the purpose of technology?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?