Prompt What if the United States, Mexico, and Canada took the EU's example and joined to form a North American Union? Based on your knowledge of the European Union, describe two setbacks or hurdles that this idea might face.​

The mantle is made up of which structural zones?

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

Read the article titled "castro resigns." why did the us impose trade sanctions against cuba in 1962?