Global warming is that the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) thanks to human activities, primarily fuel burning, which increases heat-trapping greenhouse emission levels in Earth's atmosphere.
Causes of global warming
There are 2 main reasons why this happens. Unfortunately, both are huge and they have a severe effect on the planet. In addition, they have caused global warming since the early twentieth century. They are:
1. Deforestation - The Destruction of forests across the planet, in order to obtain wood and usable space is the main reason for global warming. Every day, millions of trees are cut down and destroyed. Everyone needs several decades to develop, but we destroy it in minutes.
2. Industrial emissions - factories around the world are having a negative effect on the environment. Most of them produce carbon dioxide, especially those that use some form of heat and produce smoke. In addition, energy production also leads to carbon dioxide emissions.