Final answer:
Global warming is a widely discussed issue covered in the news, referring to the long-term increase in Earth's average surface temperature due to human activities.
Step-by-step explanation:
Global warming is a topic covered extensively in the news. It refers to the long-term increase in Earth's average surface temperature due to human activities, primarily the burning of fossil fuels and deforestation. It is a subject studied in various disciplines such as Biology, Geography, and Environmental Science. The examples mentioned in the question imply that global warming is a widely discussed issue.
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