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Lee Kuan Yew died – level 3
02-04-2015 15:00
Tens of thousands of people braved heavy rain, lining...Costa Rica uses clean energy – level 1
01-04-2015 15:00
Clean energy is important to Costa Rica. It has...Costa Rica uses clean energy – level 2
01-04-2015 15:00
Clean energy is so important to Costa Rica that...Costa Rica uses clean energy – level 3
01-04-2015 15:00
Could it be the cleanest country in the world?...