It has been rumored that Olympic athletes living at the Olympic Village have lots of sex with each other. What is one possible explanation for this behavior?

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

When analyzing tree rings, what do scientists assume a thin ring indicates?

Which prefix mean under less or below