19 °C warmer http://www.giss.nasa.gov/research/briefs/ma_01/ greenhouse gases such as carbon dioxide estimated -18°C http://www.giss.nasa.gov/research/briefs/ma_01/ [ii] http://www.giss.nasa.gov/research/briefs/ma_01/ 19 °C warmer http://www.giss.nasa.gov/research/briefs/ma_01/ would be -18°C https://www.giss.nasa.gov/research/briefs/ma_01/ https://www.giss.nasa.gov/research/briefs/ma_01/ בערך 18 מעלות מתחת לאפס, לעומת 15 מעלות צלזיוס sem ele a temperatura média na Terra seria de -18ºC estimated -18°C http://www.giss.nasa.gov/research/briefs/ma_01/ if wrongly http://www.giss.nasa.gov/research/briefs/ma_01/ http://www.giss.nasa.gov/research/briefs/ma_01/ http://www.giss.nasa.gov/research/briefs/ma_01/