To illustrate: If we are at sea level, the huge expanse of air above us exerts a constant pressure on us of about 15 pounds per square inch [1 kg/sq cm].
Now the zoning here was massive, so I felt an obligation to create magnificent parks on these waterfronts, and I spent an incredible amount of time on every square inch of these plans.
It weighs more than 5 quadrillion [5,000,000,000,000,000] tons and presses down on our heads with a force of 14.7 pounds per square inch [1.03 kg per sq cm or 101 kilopascals or 1,013 millibars] at sea level.