See the sources for this.

How did the conspiracy theory begin?

They do not pose health risks to humans.

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Unless great care is taken, any effort to debunk misinformation can inadvertently reinforce the very myths one seeks to correct.

Webdebunking myths is problematic.

Webthis is the result of the sun warming the ground, causing warm air to rise and condense into clouds later in the day, the met office says.

Webthe definitive internet reference source for researching urban legends, folklore, myths, rumors, and misinformation.

But more immigration has not caused more crime.

Webwhen an undocumented immigrant does commit a crime, it can lead to a sense of lawlessness and chaos.

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