Questions 1-3 are about the following passage.

Global Warming is the idea that the world's temperature began to increase in the twentieth
century and is continuing to increase. During the twentieth century, the global surface
temperature went up by approximately 0.6 degrees Celsius. This may not seem like a lot, but
this type of temperature rise is very unusual, considering Earth's history.

Scientists believe that today's global warming is not caused by nature. Instead, it is humans who are causing it. Human activity is causing Earth's atmosphere to change. Carbon emissions from factories, livestock industry, airplanes, and automobiles are all threats to the ozone layer of the atmosphere.

It may seem like fun to have a world without winter, but global warming may result in the melting of the polar ice caps and rising sea levels. This would destroy coastal towns and
cities and wipe out a lot of animal species. This is not something anybody wants.