Question

2m
$2m {}^{2} - 4m \\ 9m {}^{2} - 4$
-4m
9m2-4​

Answer 1

Answer:

Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

Step-by-step explanation:

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