In order for a dog to move, it has to pull on the spring - loaded leash, which creates pressure on the neck. (peterdobias.com)
Different food sources create pressure for genetic changes, which can happen more quickly than most people think. (myersdetox.com)
This in turn creates pressure in your home that causes cold air to be sucked in through the various cracks and gaps that exist between building materials. (moneysense.ca)