How Does Trump rolls back landmark policy regulating greenhouse emissions Work?

Trump rolls back a landmark policy that limits how much greenhouse emissions factories and cars can produce, like taking away a rulebook that tells kids how many cookies they can eat at snack time.

Imagine you're on a playground, and there's a rule that says each kid can only have 2 cookies during snack time. That rule helps keep the playground from getting too messy with extra crumbs, just like greenhouse emissions help keep the air clean.

Now imagine Trump takes away that rulebook so kids can eat as many cookies as they want. That’s what he did to the landmark policy, it let big companies and cars emit more pollution, like letting kids eat 10 cookies instead of just 2.

This policy used to make sure factories and cars didn’t pollute too much by setting limits on emissions. Rolling it back means those limits are gone or lower, so more pollution goes into the air, kind of like giving everyone a bigger cookie jar.