Our Changing Climate

According to the article, what is the main cause of climate change over the last 100 years?

• Greenland's melting ice sheet

• cow farts

• human activity

• solar panels

Which sentence from the article most helps you to answer the previous question?

• The global warming of the past 50 years is primarily due to human activities.

• Carpooling to school and work cuts down on the burning of fossil fuels.

• This difference caused Greenland's ice sheet to lose 197 billion tons of ice in July 2019.

• You can even install solar panels on your roof that use the sun for natural energy.

Which of these include greenhouse gases discussed in the article?

• carbon dioxide and methane gas

• nitrous oxide and natural gas

• water vapor and ozone

• gasoline and coal dust

How do greenhouse gases contribute to the rapid warming of Earth over time?

• Trees absorb carbon dioxide and then slowly die, leaving less shade on Earth.

• They cause a blanket to form in the air and the sun's heat is released.

• More human transportation causes greenhouse gases to be released.

• They cause a blanket to form in the air and the sun's heat is trapped.

Why is recycling such an important part of the fight against global warming?

• The greenhouse effect is primarily caused by littering.

• Scientists believe the recycling can save money on plastics we need.

• Recycling helps to keep our oceans free of plastics and garbage.

• The trash we produce goes into landfills which produce greenhouse gases.

Which of the following reasons could explain how humans contribute to the harmful amount of cow farts on the planet?

• The fields that cows graze in are full of greenhouse gases that harm the planet.

• Farmers are choosing not to raise cows because of methane gas.

• Humans keep wanting the products from cows, like milk and beef.

• Cows are naturally gassy animals, and there is nothing we can do about that.