Human Activities and Climate Change

A steady increase in global temperature has been recorded between 1900 and today. Before concluding that this rise in temperature is the result of the increased burning of fossil fuels since that same time, which of the following questions would have to be answered?

• What is the CO2 content in one metric ton of fossil fuels?

• Which gases are released when burning fossil fuels?

• What, if any, temperature rise was occurring prior to 1900?

• How have humans adapted to temperature change?

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The graph shows data on the carbon dioxide emitted when producing different foods. Which of the following claims is supported by the data?

• The highest carbon emissions come from the production of dairy products.

• Producing 1 lb of salmon results in less CO2 emissions than producing 1 lb of pork.

• Producing food from animals results in less carbon dioxide emissions than from plants.

• The highest carbon emissions come from the production of beef products.

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The pie chart shows percentages of carbon dioxide (CO2 ) emissions by sector. The greatest reduction in carbon dioxide emissions could be achieved if it were possible to reduce, by half, which source of emissions?

• Agriculture

• Electricity

• Commercial & Residential

• Industry

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These gases trap and hold energy of the sun in the atmosphere around the Earth and heat it.

• Global Warming

• Global Climate Change

• Greenhouse Gases

• Fossil Fuels

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What are some indicators that show that the overall climate of Earth is getting warmer?

• Indicators such as decreased average temperatures, no changes in patterns of precipitation, lowering sea levels, ice and snow forming show that the overall climate of Earth is getting warmer.

• Indicators such as increased average temperatures, changes in patterns of precipitation, rising sea levels, ice and snow melting sooner, etc. show that the overall climate of Earth is getting warmer.

• Indicators such as increased average temperatures, changes in patterns of precipitation, lowering sea levels, ice and snow melting sooner, etc. show that the overall climate of Earth is getting warmer.

• Indicators such as increased average temperatures, changes in patterns of precipitation, rising sea levels, ice and snow forming show that the overall climate of Earth is getting warmer.

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The main human activity that releases greenhouse gases is...

• using bottled water

• burning fossil fuels

• texting on cellphones

• eating meat

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Choose which answer(s) are possible effects of rapid atmosphere warming:

• Increased hurricanes and typhoons

• Increased diseases

• Disastrous forest fires

• Starvation of the poorest populations

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What are greenhouse gases?

• gases that cause climate change

• gases that emit green smoke

• gases that are used to make green colored glass

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The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere

• lower levels of nitrogen in the atmosphere

• higher levels of carbon dioxide in the atmosphere

• higher levels of oxygen in the atmosphere

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What is the primary greenhouse gas emitted?

• Methane

• Carbon Dioxide

• Nitrous oxide

• Flourinated gas

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