According to the article, 'The Future of Energy Use', the Earth's average surface temperature increased in the last century by about 2.5 °C.
What is global warming?
The expression global warming refers to the sudden increase in temperatures around the Earth during the last decades.
It has been shown that global warming is directly associated with the burning of fossil fuels.
Global warming is caused by the increase of greenhouses gases (for example, carbon dioxide) in the atmosphere.
Learn more about global warming here:
https://brainly.com/question/3553382
