billion times billion to build billion to one billion tonnes billion tons billion tons of carbon billion total billion trade billion transactions billion transistors billion tree billion trees billion trillion billion units billion users billion valuation billion video views billion videos billion viewers billion views billion views on youtube billion web billion websites billion when billion women billion won billion words billion worldwide billion worth billion year billion years billion years ago billion years from now billion years of evolution billion years old billion yen billion young billion yuan billion-dollar billion-dollar business billion-dollar company billion-dollar idea billionaire billionaire boys billionaire businessman billionaire entrepreneur billionaire has billionaire investor billionaire philanthropist billionaire warren billionaires billionaires have billionaires in the world billionaires list billions billions and billions billions and billions of dollars billions have billions more billions of animals billions of cells billions of data billions of devices billions of dollars billions of euro billions of euros billions of galaxies billions of light years billions of lives billions of miles billions of neurons billions of other billions of people billions of people will billions of pounds billions of stars billions of times billions of tiny billions of tons billions of us billions of users billions of won billions of years billions of years ago billions of years old billions spent billions will billionth billionth of a second billionth time billis billiton billo billow billowed billowing billowing out billows billroth