Is gas-tax hike a positive step towards a green planet?

A Michigan congressman wants to put a 50-cent tax on every gallon of gasoline to try to cut back on Americans' consumption.

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# A tax on gas can in a way reduce dependence on import oil, reduce traffic congestion along with carbon emissions.

# The automobile is the America's biggest polluter and Americans use more gas than the next 20 countries combined.

# Some environmentalists and economists say pain at the pump may be bad for Americans, but good medicine for a sick planet.

# Raising gas prices can have short-term reduction but bottom line is over long term, that isn't going to have much of an effect.