... million, billion 101 1,001 etc a/one hundred and one, a/one thousand and one 201 2,001 etc two hundred and one, two thousand and one Ordinal Numbers a b c 1st 2nd 3rd first; ‘The first of April” ... dearly in terms of both money and health Air pollution causes buildings and machines to deteriorate Our poisioned air damages crops, livestock, roads And metals and forces huge cleaning bills ... Cause and Effect _ _ _ 16 UNIT THREE: NUMBERS Numbers and the language describing numbers are very important to understand when you read research articles, books...