it would still be smoggy
The air would be different because it would contain less oxygen than the air we breathe today
About a billion bucks.
a billion.
In pounds (British) it would be about £175bn (the English or American billion issue doesn't arise as they cancel out)
around 10 billion rather then the 6-7 billion on earth today
$1 billion buy today
1.3 billion
Yes; without it, 7 billion people would starve.
1.2 billion dollars
It is estimated that approximately 108 billion people have lived on Earth since the beginning of humanity. If no one ever died, this number would keep increasing at a rapid rate, potentially leading to resource scarcity, overcrowding, and other challenges.
If you one were to breathe too little, they could feel nauseous, experience headaches or faint. If you were to breathe to much, there would be an onset of hyperventilation, which can cause similar symptoms.
The Sears Tower was renamed Willis Tower on July 16, 2009. I'm not sure how much it would cost to build today but I know it is worth over $1 Billion USD today.