what is the average increase in global temperature
For the last 50 years, global temperature rose at an average rate of about 0.13Â°C (around one-quarter degree Fahrenheit) per decade-almost twice as fast as the 0.07Â°C per decade increase observed over the previous half-century.or the last 50 years, global temperature rose at an average rate of about 0.13Â°C (around one-quarter degree Fahrenheit) per decade-almost twice as fast as the 0.07Â°C per decade increase observed over the previous half-century.