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.
Consumption of caffeine drinks has increased dramatically in the last 5 years and consequently the numbers of individuals suffering adverse effects is greater also. Some people suffer an intolerance to caffeine. Caffeine is a stimulant which means it can make you feel alert and less sleepy for a short period of time. Caffeine is also a natural diuretic which means it can increase the amount of urine you produce.