stressful - something that makes you feel worried, tense and nervous, congestion - crowding together of vehicles so that they can't move, road rage - violent and angry behaviour by drivers towards other drivers, statistics - sets of numbers representing facts or measurements, biofuels - fuel produced from living matter such as plants and trees, powering - supplying energy to make a machine work, commerical - related to business, air traffic control - directing pilots from the ground so that planes can fly in and out of airports in a safe and orderly way, ambitious - something that is good and worthwhile, but not easy to achieve, network - system of lines that are connected to each other,

Aviation

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