▁the ▁heat ▁death ▁of ▁the ▁universe ▁by ▁extending ▁subject ive ▁time ▁to ▁infinity ▁while ▁exp ending ▁only ▁a ▁finite ▁amount ▁of ▁energy . ▁ ▁D ys on ▁believed ▁global ▁war ming ▁is ▁caused ▁merely ▁by ▁increased ▁carbon ▁dio x ide ▁but ▁that ▁some ▁of ▁the ▁effects ▁of ▁this ▁are ▁fav ou rable ▁and ▁not ▁taken ▁into ▁account ▁by ▁climate ▁scient ists , ▁such ▁as ▁increased ▁agricult ural ▁yield . ▁He ▁was ▁ske pt ical ▁about ▁the ▁simulation ▁models ▁used ▁to ▁predict ▁climate ▁change , ▁arg uing ▁that ▁political ▁efforts ▁to ▁reduce ▁causes ▁of ▁climate ▁change ▁dist ract ▁from ▁other ▁global ▁problems ▁that ▁should ▁take ▁priority . ▁He ▁also ▁signed ▁the ▁World ▁Cl imate ▁Dec laration ▁that ▁there ▁" is ▁no ▁Cl imate ▁Emer gency ." ▁ ▁Biography ▁ ▁Early ▁life ▁ ▁Born ▁on ▁ 1 5 ▁December ▁ 1 9 2 3 , ▁at ▁Crow th or ne ▁in ▁Ber k shire , ▁England , ▁D ys on ▁was ▁the ▁son ▁of ▁M ild red ▁Lucy ▁( At key ) ▁and ▁George ▁D ys on . ▁His ▁father , ▁a ▁prominent ▁composer , ▁was ▁later ▁kn ight ed . ▁His ▁mother ▁had ▁a ▁law ▁degree , ▁and ▁after ▁D ys on ▁was ▁born ▁she ▁worked ▁as ▁a ▁social ▁worker . ▁D ys on ▁had ▁one ▁sib ling , ▁his ▁older ▁sister , ▁Alice , ▁who ▁remembered ▁him ▁as ▁a ▁boy ▁surrounded ▁by ▁en cyc loped ias ▁and ▁always ▁calculating ▁on ▁sheets ▁of ▁paper . ▁At ▁the ▁age ▁of ▁four ▁he ▁tried ▁to ▁calculate