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.
Caffeine withdrawal symptoms vary in type and severity from person to person. These caffeine withdrawal symptoms are common: Chills and/or hot spells. Decreased alertness. Depressed mood. Difficulty concentrating or thinking. Digestive issues (usually constipation, but sometimes also nausea and / or vomiting)