The increase in the temperature of the ("glob") earth due to the the effect of greenhouse gases.The burning of fossil fuels from cars is a leading cause to global warming. To regulate the amount of carbon dioxide emissions released from any car, most states require a car to have their emissions tested once a year. This precaution helps to slow the pace of global warming, which causes several icebergs to melt, furthermore, impacting the living conditions of tundra animals such as polar bears.
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