All the time
Yes you capitalize Earth on walk on The Earth but The should not be capitalized.
No, you should not. You should only capitalize a word when it is at the start of a sentence or when it is a proper noun.
It should be --- Earth Day, Planet Earth.
No.
no
No
Yes
You only capitalize with if it begins a sentence. Example:With recent rains, crops should grow well.
Unless it is the first word in a sentence, then you don't need to capitalize "tobacco."
No.
At the beginning of a sentence.
Yes it should be capitalized.