Whenever i smell car fumes i get nauseous. even if the car is well ventilated. and at home even when a car passes by i grt nauseous ?

Chemical sensitivity: Automotive fumes are toxic, containing a variety of chemicals such as benzene that can make anyone sick if exposed to high amounts. Nausea is a common reaction. Some people are more sensitive and react to trace amounts, which may be due to your liver not properly detoxifying. Minimize exposure and try antioxidants like Vitamin C and E, selenium and N-acetyl cysteine. See http://mcsrr.org for more.