MYTH OR FACT
Many people say volcanoes emit more CO₂ than humans each year.
Answer: Myth. Human activities emit far more CO₂ than volcanoes.
What is a Myth. Human activities emit far more CO₂ than volcanoes.
This gas is responsible for most human-caused warming.
Answer: What is carbon dioxide?
What absorbs about one-quarter of human CO₂ emissions.
What is the Earth’s Oceans.
$100
Rising temperatures increase the frequency and severity of these dangerous heat events.
Answer: What are heat waves?
$100
The year atmospheric CO₂ first exceeded 400 parts per million was approximately this decade.
Answer: What is the 2010s?
The Earth’s climate has always changed naturally, so current warming must be natural too.
What is a Myth. Natural climate changes occur, but current warming is primarily driven by human emissions.
Greenhouse gases trap this form of energy leaving Earth’s surface.
Answer: What is infrared radiation (heat)?
This floating Arctic ice has been shrinking rapidly in recent decades.
What is sea ice.
$200
Warmer air can hold more of this, increasing heavy rainfall events.
Answer: What is water vapor?
$200
This observatory in Hawaii has provided the most famous continuous record of atmospheric CO₂.
Answer: What is Mauna Loa Observatory?
Scientists disagree widely about whether climate change is happening.
Answer: Myth. The overwhelming majority of climate scientists agree it is occurring.
Burning coal, oil, and natural gas releases large amounts of this gas.
What is Carbon Dioxide.
As oceans absorb more CO₂, they become more of this.
What is acidic?
$300
This natural disaster becomes more likely when vegetation dries out.
Answer: What are wildfires?
About what percentage of climate scientists agree that humans are causing global warming?
Answer: What is roughly 97–99%?
A cold winter storm proves global warming isn’t real.
Answer: Myth. Climate refers to long-term trends, not individual weather events.
This greenhouse gas is more potent than CO₂ but remains in the atmosphere for a shorter time.
What is Methane?
The loss of this reflective surface causes Earth to absorb more solar energy.
What is Ice of snow?
$400
Low-lying island nations are especially vulnerable to this consequence of climate change.
Answer: What is sea-level rise?
$400
This term describes the ability of forests, oceans, and soils to absorb carbon from the atmosphere.
Answer: What is a carbon sink?
Carbon dioxide makes up less than 1% of the atmosphere, so it cannot affect climate.
What is a myth? Small concentrations can have powerful effects on heat retention.
Many people think greenhouse gases are harmful, but without them Earth would be too cold for most life. The real concern is that humans are increasing these gases and strengthening this natural phenomenon.
What is the green house gas effect.
This massive ice sheet contains enough ice to raise global sea levels by more than 20 feet if completely melted.
What is the Greenland Ice Sheet?
$500
Climate scientists use this term for a major change that can reinforce warming, such as melting permafrost releasing methane.
Answer: What is a positive feedback loop?
$500
To limit warming to around 1.5°C, the world must generally reach this status around mid-century.
Answer: What is net-zero greenhouse gas emissions?