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How much of the world's water is available for use?
How long does it take a styrofoam cup to decompose?
Which country currently emits the most greenhouse gases?
How many human deaths a year does the World Health Organization attribute to climate change?
How long does it take for carbon dioxide in the atmosphere to disperse?
According to a global study of wind power in 2005, what extent of the world's total energy usage could be satisfied if all viable wind power locations were exploited?
The greenhouse effect is caused by…
Which of these countries has the highest per capita carbon dioxide emissions?
Which of the following activities contributes the most to carbon emissions globally?
In 2012, China's per capita emissions of carbon dioxide were: