Understanding Our Planet's Climate Crisis

What epoch followed the Holocene, marked by significant human impact?

• Mesozoic

• Anthropocene

• Pleistocene

• Cenozoic

What is the primary cause of the transition from the Holocene to the Anthropocene?

• Natural climate variations

• Asteroid impacts

• Significant human impact

• Volcanic eruptions

What is a tipping point in the context of climate change?

• A successful climate change mitigation effort

• A point of no return in climate variations

• The peak of global temperatures

• The start of an ice age

What was the CO2 concentration in the atmosphere that marked the crossing of a critical boundary?

• 200 ppm

• 415 ppm

• 500 ppm

• 350 ppm

What are the consequences of crossing carbon dioxide thresholds in the atmosphere?

• Decreased global temperatures

• Stabilization of sea levels

• Increased plant growth

• Runaway warming and climate instability

What is the significance of the Amazon rainforest in the context of climate change?

• It has no significant impact

• It is a major source of fossil fuels

• It acts as a carbon sink, reducing CO2 levels

• It contributes to global cooling by reflecting sunlight

What immediate priority is outlined for combating climate change?

• Reducing carbon emissions to zero

• Investing in fossil fuels

• Increasing global carbon emissions

• Expanding urban areas

How can individual and collective actions contribute to a sustainable future?

• By increasing consumption of natural resources

• By ignoring climate change warnings

• By investing in coal industries

• By reducing carbon footprints and supporting green policies