Operative term, "...left uncontrolled can be death:"
Yes, bacteria (who are irrelevant here) can cause death to an individual. But, they're generally rather well monitored and controlled.
When did a bacteria ever have a will, or a consciousness, or a conscience, or require freedom, or love, or even loathe???
And when did bacteria ever think, develop, invent, engineer, or build things and do things that were great?
You're right: never. They're ever so slightly different than humans, who we're talking about here, and who have all those faculties.
If you want to equate humans, and their behaviors, endeavors, accomplishments, and such with bacteria, you're way...way off base...but you actually knew that already, as you well know what I was talking about, and can't disagree with me.
Your weak attempt, by comparing people to infectious bacteria, isn't doing you much good. It's a weak response, un-scientific, and banal in etremis.
But did you actually have another choice?
Well, you did, but you don't know it!
It was to simply accept the reality I put forth, admit you didn't quite ever think of it like that, and go think before responding, where you would've said that you're re-considering based upon what I (and many a scientist) has said regarding this idea.
I expected nothing more from you than what you posted.
You're miserably ionadequate thinking isn't appreciated, just like the idea that humanity can profoundly affect a planet that's 33 million times larger in surface area than is our entire population standing in a huge group.
Think about that for a minute before you decide that the small fraction of humanity that actually drives cars and makes smoke and such can actually affect that world by our miniscule efforts.
Going away is OK, too!