please answer my last questions

Is a state government creates a new tax to fund schools a example of checks and balances

In russia which of these challenges affects the transportation of both petroleum products and other goods?

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