The average temperature of the Earth's atmosphere and oceans indicates global warming. Eleven out of the past twelve years are among the warmest since 1850. During the past fifty years, the warming has taken place twice as fast as during the preceding fivty.
The average global temperature increased by 0.74 °C during the course of the 20th century. This, in itself, does not seem much, but the effects are significant both on land and in the oceans.
The carbon footprint represents the direct environmental impact of our actions in the form of carbon dioxide emissions. We all have a moral and social responsibility to reduce our own emissions of carbon. A reduction of carbon emissions is one of the most important concepts involved in breaking global warming and climate changes.