B. measuring is the answer because you need to know how to measure
Answer:
SHANGHAI—For over three decades the Chinese government dismissed warnings from scientists and environmentalists that its Three Gorges Dam—the world's largest—had the potential of becoming one of China's biggest environmental nightmares. But last fall, denial suddenly gave way to reluctant acceptance that the naysayers were right. Chinese officials staged a sudden about-face, acknowledging for the first time that the massive hydroelectric dam, sandwiched between breathtaking cliffs on the Yangtze River in central China, may be triggering landslides, altering entire ecosystems and causing other serious environmental problems—and, by extension, endangering the millions who live in its shadow.
The answer is Technology.
<span>Some Europeans believed that the Black Death was sent by God
to punish them for their sins. The Black Death resulted to deaths of an
estimate of 75 to 200 million people in 1346-1353. It was a plague that was
caused by rat fleas that live on black rats that were regular passengers of
merchant ships that came from Central Asia and made its way to the Mediterranean
and Europe. The plague affected
religious, social, and economic ways of the Europeans. </span>
