Answer: Most likely the industrial revolution.
Explanation: The use of machines in production became more and more prevalent, eventually many factories were built in cities which caused pollution therefore making the air gross.
Answer:
The US had the strongest Navy and dominated both the Pacific and the Atlantic uncontested; this didn't change throughout the Cold War, even though naval technologies changed a lot (nuclear subs, etc), and the USSR invested heavily in surface and submarine navies.
Explanation:
There were no historical comparisons Right after they occurred, the terror attacks on september 11 .
<h3>What is
the terror attacks on september 11 ?</h3>
The September 11 attacks, also known as 9/11, were a series of four coordinated terrorist operations carried out against the United States by the militant Islamic extremist network al-Qaeda. On the morning of September 11, 2001, nineteen terrorists hijacked four commercial airliners as they flew from the northeastern United States to California. The attackers were divided into three groups of five and one group of four, each with one designated flight-trained hijacker who took control of the plane. Their intention was to crash the planes against important American structures, causing mass casualties and significant structural damage.
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brainly.com/question/27439510
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