Scientists say that doubling pre-industrial carbon dioxide levels will likely cause global average surface temperature to rise between 1.5Â° and 4.5Â° Celsius (2.7Â° to 8.1Â° Fahrenheit) compared to pre-industrial temperatures.
Furthermore, they may experience withdrawal symptoms that can include headaches and irritability, perceived loss of performance both physically and mentally. People suffering with intolerance to caffeine have reported feelings of disorientation, loss of judgment, anxiety, dizziness, agitation and a hyper activeness.
Is that an Allergy or an Intolerance? The caffeine allergy can sometimes be very irritating and usually shows its reaction within few minutes. Some people might have an intolerance or sensitivity to caffeine which is different from allergy. The intensity of intolerance is very mild and does not have any relation to the immune system of the body. But allergy reaction should be taken as a serious matter and it is life threatening in some cases.