Wish granted, the entire world is now covered in smog and pollution because every single thing runs on gas and oil. Including coffee makers, toothbrushes, vibrators, phones, computers, and even your mouse. People are getting dementia, as well as dying from lung disease and carbon monoxide poisoning because of the constant exhaust that's in the air. Birth rates are down because of the increased level of birth defects, and humans will be extinct in 50 years, as well as most other life forms on the planet.
I wish this topic was really called The Monkeys Paw.