The modernization of US cities has caused a reduction in overall river pollution. The development of large farms has polluted the river through waste runoff. The use of the river for shipping has stayed relatively the same since 1800. The decrease in fishing in the river has led to a shortage of seafood products.
<span> His big swing led to escalating home run totals that not only drew fans to the ballpark and boosted the sport's popularity but also helped usher in the </span>live-ball era<span> of baseball, in which it evolved from a low-scoring game of strategy to a sport where the home run was a major factor. As part of the Yankees' vaunted "</span>Murderer's Row<span>" lineup of 1927, Ruth hit 60 home runs, extending his MLB single-season record. He retired in 1935 after a short stint with the </span>Boston Braves<span>. During his career, Ruth led the AL in home runs during a season twelve times.</span>
The correct answer is the Influenza Pandemic.
This Influenza (flu) Pandemic killed between 20 and 100 million people (estimates differ) - more than the war itself!
The source of the Pandemic is still not known, and people suggest such places as the US, China and France.
The ultimate effect was an end to the Cold War. The leader of Russia at the time Gorbachev enacting These social and economic policies resulted in the tearing down of the Berlin Wall, and many civilian protest in eastern bloc countries.
