MELTING ICE: A HOT TOPIC. material source The Earth has warmed by approximately 0.75 °C since pre-industrial times. Eleven of the warmest years in the past 125 years occurred since 1990, with 2005 the warmest on record. There is overwhelming consensus that this is due to emissions of greenhouse gases, such as carbon dioxide (CO2), from burning fossil fuels. Examination of ice cores shows that there is more CO2 in the atmosphere than at any time in the past 600,000 years Warming in this ce
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