Developed states did not initially know they were causing...

CON

Developed countries have a higher obligation to combat climate change

Developed states did not initially know they were causing warming.

http://www.debatepedia.org/en/index.php/Debate:_Developed_countries_have_a_higher_obligation_to_combat_climate_change
score

BM25 score: 14.01
climate: 7.88
conclusion: 6.64 (boost 1.50, idf 6.06, tfNorm 0.73)

sourceText: 1.25 (boost 0.20, idf 2.98, tfNorm 2.09)

change: 6.13
conclusion: 5.74 (boost 1.50, idf 5.24, tfNorm 0.73)

sourceText: 0.39 (boost 0.20, idf 0.93, tfNorm 2.09)