Understanding Global Warming Causes

What is the main cause of the current rise in global temperatures according to scientists?

• Human activities over the past two hundred years

• Natural climate cycles

• Volcanic eruptions

• Solar radiation changes

Who was the Swedish scientist that calculated the impact of carbon dioxide on global temperatures in 1896?

• Svante Arrhenius

• Albert Einstein

• Niels Bohr

• Marie Curie

What did some scientists in the twentieth century believe about pollution's effect on global temperatures?

• It might cause the planet to cool

• It would have no effect

• It would only affect local climates

• It would cause immediate warming

How did computer technology help scientists understand global warming?

• By providing more precise data and better models

• By reducing carbon emissions

• By predicting weather patterns

• By measuring ocean levels

What was the predicted temperature increase if carbon dioxide levels doubled, according to Arrhenius?

• 5 to 6 degrees Celsius

• 1 to 2 degrees Celsius

• 10 to 12 degrees Celsius

• 3 to 4 degrees Celsius

What was a major factor in the nineteenth century that increased carbon dioxide in the atmosphere?

• The growth of factory-made goods and automobiles

• Deforestation

• Agricultural expansion

• Increased volcanic activity

What do scientists today agree on regarding global warming?

• Earth is getting warmer quickly due to human activities

• Global warming is a natural process

• The effects of global warming are negligible

• Global temperatures are stable