Climate Change Evidence and Impact on Earth's Systems

The video discusses the reality of climate change, emphasizing human contributions through increased CO2 emissions. It explains the greenhouse effect, historical CO2 levels, and isotope evidence. The video also covers other greenhouse gases, temperature trends, and the impact on oceans, including sea level rise and acidification. Future projections indicate significant warming and sea level rise, highlighting the urgency of addressing climate change.

What is the main reason for the skepticism about climate change mentioned in the video?

• Lack of scientific evidence

• Insufficient media coverage

• Belief in a conspiracy theory

• Government regulations

What role does the sun play in Earth's climate system?

• It is the primary source of warmth

• It cools the Earth's surface

• It absorbs heat from the Earth

• It reflects heat back to space

How have human activities affected the concentration of carbon dioxide since the Industrial Revolution?

• Eliminated it completely

• Kept it constant

• Decreased it by 3%

• Increased it by 3%

What evidence supports the idea that humans are responsible for the increase in carbon dioxide levels?

• The ratio of carbon isotopes

• Volcanic activity

• Natural climate cycles

• Solar flares

Which greenhouse gas is primarily emitted by farm animals and natural gas processing?

• Methane

• Nitrous oxide

• Ozone

• Carbon dioxide

What has been the trend in global temperatures since the 1970s?

• Increasing rapidly

• Fluctuating

• Stable

• Decreasing

How much have ocean levels risen since 1901?

• 8 inches

• 6 inches

• 4 inches

• 2 inches

What is the projected increase in Earth's temperature if current CO2 trends continue?

• 0.5 to 1 degree

• 1 to 2 degrees

• 2.5 to 5 degrees

• 5 to 7 degrees

What is the potential impact on ocean species if the pH level reaches 7.8?

• No impact

• All species will thrive

• One third of species could be wiped out

• Increase in species

What was the state of North America the last time Earth was a few degrees colder?

• A tropical paradise

• Covered in a mile-thick sheet of ice

• A desert

• Covered in forests