Problem: Given the question: Tree city and Leaf city were the two biggest cities in Boulderland. Tree city burned lots of gas and other fossil fuels, while Leaf city was very protective towards its environment. Given the paragraph above, please answer correctly the following question: Which city caused less harm to human beings?
++++++++++++++++++++++++++++++++
The answer is:
Leaf

Problem: Given the question: Due to economic sanctions and trade embargoes, Cuban citizens primarily use cars designed in the late 1940s and early 1950s. These cars contain engines that were designed before the introduction of the catalytic converter. Meanwhile trade relations between nearby Panama and Japan have enabled the citizens of Panama to drive cars with the most up to date catalytic converter technology possible. Given the paragraph above, please answer correctly the following question: Which country's cars, Cuba's or Panama's, will contribute to more smog formation?
++++++++++++++++++++++++++++++++
The answer is:
Cuba's

Problem: Given the question: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought. Given the paragraph above, please answer correctly the following question: Which country had precipitation with a higher pH?
++++++++++++++++++++++++++++++++
The answer is:
Greece