Final answer:
Global warming is an increase in average temperatures around the planet due to greenhouse gas emissions. It leads to various environmental impacts like the melting of glaciers and changes in weather patterns.
Step-by-step explanation:
Global warming is an increase in average temperatures around the planet. It refers to the long-term rise in the Earth's average temperature due to the increase in greenhouse gases, primarily carbon dioxide and methane, in the atmosphere. This increase in temperatures has various consequences, including the melting of glaciers, rising sea levels, and changes in weather patterns.
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