<span>The invention of tools and mastery of fire led to the development of "advanced civilizations," since this allowed for early humans to gain far more food sources and intake more calories. </span>
It was most successful in Pax Romana. It was hard to maintain because of all the people and enemies.
The middle colonies were New Netherlands/New York, New Jersey, Pennsylvania and Delaware. The most populous was Pennsylvania settled during the 17th century. Settlers usually organized themselves in small farms spread throughout the colony with a few cities. <em>The Middle colonies had two major ports who were the main economic outposts, New York City and Philadelphia.</em>
I don’t know mane I just need help . And i think it exponentially increased
Answer:
The United States took first steps to keep the air clean. Cost-effective ways to reduce pollution were emphasized. The United States created the environmental protection agency. Hope this helps
Explanation: