Hot weather lowers exam average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather . A major average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather from three universities in the USA says average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather may reduce learning in the average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather and long term. Hot average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather on test days, and higher than average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather yearly temperatures lowered average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather . Researchers looked at average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather the weather affected test scores from 10 million American students. Findings showed that a average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather rise of just 0.55ºC over one year led to a one per cent decrease in average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather . The average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather paper is called "Heat and Learning". It was published last month. A worrying average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather in the study is that global warming may affect the future average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather of students around the world. Researchers said that if average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather temperatures continued to rise, the average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather American average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather could lose $25,000 because of lower test scores. Air average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather in classrooms could stop average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather . Hotter weather was " average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather damaging" for average conclusion conditioning global grades heat how income learning particularly poorer research results short student study temperature this weather students.