On the one hand, <u><em>your</em></u> is a possessive and means that something belongs or is related to "you", whoever that subject is. On the other hand, <em><u>you're</u></em> is a contraction. It is short for "you are" that includes the personal pronoun <em>you</em> and the conjugated verb <em>to be</em>. Therefore, the sentence that accurately uses the homophones "your" and "you're" is: Don’t forget to pick up your homework before you leave.
This is probably because most people don't really care about why you're sending the email. They just to know what you'd like or what question you have. That's just my guess.
And last, this would cause a great deal of air pollution. Trees are the ones that are helping taking in our carbon dioxide, and now we're releasing even more into the air now. In the end, fires may cause a catastrophic ecosystem.
