A paper recently published in the peer-reviewed journal Environmental Sciences Europe
states that 18.9 billion pounds (8.6 billion kilograms) of glyphosate have been used globally. The herbicide’s use has risen almost 15-fold since the introduction of so-called “Roundup Ready” genetically engineered crops in the 90’s.
Enough glyphosate was applied in 2014 to cover every harvested acre of cropland worldwide several times over, with estimates of its use coming in at (minimally) 0.53 kilogram/hectare. This makes glyphosate the most commonly used and widely sprayed herbicide in history.