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After Volkswagen admitted that they cheated on emissions tests involving about 11 million diesel vehicles,  there is more scrutiny than ever about emissions testing.  Governments worldwide rely on the car makers, to police themselves when it comes to emissions. CNN's Sherisse Pham visits one independent test house who says its test results are far more accurate than those found in a lab.
After Volkswagen admitted that they cheated on emissions tests involving about 11 million diesel vehicles,  there is more scrutiny than ever about emissions testing.  Governments worldwide rely on the car makers, to police themselves when it comes to emissions. CNN's Sherisse Pham visits one independent test house who says its test results are far more accurate than those found in a lab.

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    An emissions test car companies can't cheat?

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An emissions test car companies can't cheat?

Volkswagen says it cheated on emissions tests. CNN's Sherisse Pham visits one independent group who says its test results are more accurate than a lab's.

An emissions test car companies can't cheat?

Volkswagen says it cheated on emissions tests. CNN's Sherisse Pham visits one independent group who says its test results are more accurate than a lab's.