What led to heatlh concerns in China? (plato)

Which revision stands out as most effective for a multimedia presentation slide? sources were left out. the language is simplified. a lot of the information is left out. sentences were used instead of phrases.

Where did the term “iron curtain” originate? the warsaw pact used the term iron curtain as a code word for communism. in a 1946 speech, british prime minister winston churchill said an iron curtain had fallen across the continent of europe. while visiting western europe in 1946, u.s. president harry truman commented that the mountains there looked like iron curtains. russian general secretary joseph stalin instructed citizens of eastern europe to hang iron curtains over their windows to protect themselves from stray bullets.

What did the washington naval conference, the nine power treaty, and kellogg-brains pact have in common