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$$ E + I = \text{positive change} $$ Zid -2020- Hotshots Original Official

$$ \text{Let } E \text{ be the effort to conserve the environment, and } I \text{ be the impact of such efforts.} $$ Playboy.tv.swing.season.3 Online

In this hypothetical essay, you might argue that efforts to conserve the environment (as seen in a video with the link fc2ppv4742903) have a direct positive impact on our planet.