Global temperatures rising

Global temperatures have risen as the concentrations of CO2 and methane have risen as the graphs below show.

Co2 in the atmosphere

Graph of CO2 concentration in atmosphere against year.

Methane in the atmosphere

Graph of methane concentration in atmosphere against year.

The diagram below shows variations in global temperature over the past 160 years.

Note that the y-axis shows the deviation in degrees Celsius from the 1850 mean (average) temperature.

Global average temperature anomaly (1850 - 2012)