1. Universe
2. Milky way galaxy
3. Solar system
4. Earth
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Answer:
Growth is biggest obstacle to cleaner air. The Environmental Protection Agency's new standards for ground-level ozone and particulate matter have received lots of media attention in recent weeks.
Explanation:
hope this helped it was on my school too
Greensboro sit-in, act of nonviolent protest against a segregated lunch counter in Greensboro, North Carolina, that began on February 1, 1960. Its success led to a wider sit-in movement, organized primarily by the Student Nonviolent Coordinating Committee (SNCC), that spread throughout the South
The Ancestral Puebloan people inhabited the Four Corners area of the Southwest. They are believed to have been the etc
