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Hotter weather [leads / leaden] to lower exam results, according to a new study from Harvard University, the University of California and Georgia State University. What's [most / more] , hot weather may [deduce / reduce] learning in both the short term and long term. Researchers reported that hot weather on test days and [higher / heightened] than average temperatures throughout the school year resulted [on / in] poorer grades. The study is the first [majority / major] research into the effect of [heat / hot] on students in the USA. Researchers analyzed how test scores from 10 million American students were [impacted / compacted] by the weather. Their [findings / foundries] showed that an average temperature increase [for / of] just 0.55ºC over one year resulted in a one per cent decrease in learning.

The research is in a paper called "Heat and Learning" and was [publishing / published] last month by the USA's National Bureau of Economic Research. One of the more [concern / concerning] conclusions contained in the study is that global warming may [effect / affect] leaning and the income-earning potential of students [about / around] the world. The researchers predicted that if global temperatures continued to [rise / raise] , the average American student could lose $25,000 [in / on] income over their lifetime because [for / of] lower exam results. Using air [conditioning / conditioner] in classrooms could circumvent this. The researchers also found that hotter weather was, "particularly [damage / damaging] ...for low income and [minority / majority] students" across the USA.