. Why is it that the ozone hole will not be healed for several decades?

Of the 8 territories that were brought under the flag of the united states by 1853, which on do you think was the most important addition to the growth of the united states? give 2 reasons.

Can someone explain and give me two examples of checks and balances in usa government right three examples

What is it called when an elected official is brought to trial to decide if they should be removed from office