Background Paragraph: Gasoline-powered vehicles emit a lot of harmful materials. Nitrogen oxides are formed when atmospheric nitrogen reacts with oxygen at the high temperatures found in a car engine. Carbon monoxide is a by-product of incomplete combustion of hydrocarbons. Evaporated and unused fuel releases volatile hydrocarbons into the atmosphere to help form smog. The presence of a catalytic converter in the exhaust system of the car causes these materials to react and be changed into less harmful products. 
Story: After decades of debate, Brunei decided to adopt electrical vehicles and use them extensively, ultimately phasing out gasoline powered vehicles. Their neighbor Nepal decided to continue using gasoline-powered vehicles extensively.
Which country contributed to the formation of fewer nitrogen oxides? Which country contributed to the formation of more nitrogen oxides? Which country experienced fewer volatile hydrocarbons in the atmosphere? Which country experienced less smog? Which country experienced more smog? Which country experienced more volatile hydrocarbons in the atmosphere? Which country had their vehicles emitting fewer harmful materials? Which country had their vehicles emitting more harmful materials? Which country produced less carbon monoxide? Which country produced more carbon monoxide?