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The president speaks: prevention is best: lessons from protecting the ozone layer
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Sep 2012116320
Oct 20123204052
Nov 20127653056
Dec 20124472345
Jan 20133141514
Feb 2013182419
Mar 20131221220
Apr 20137447
May 20135346
Jun 201336715
Jul 20133327
Aug 20133154
Sep 20134477
Oct 20132058
Nov 201317710
Dec 2013141214
Jan 2014134042
Feb 2014145355
Mar 2014204755
Apr 2014372432
May 2014194957
Jun 20141636
Jul 20142127
Aug 20142336
Sep 201418411
Oct 20149510
Nov 201410110
Dec 20141125
Jan 20153312
Feb 2015703
Mar 20152031
Apr 20151808
May 20159015
Jun 2015249
Jul 20156113
Aug 2015507
Sep 201520215
Oct 20151537
Nov 20151047
Dec 20151685
Jan 201624138
Feb 2016141513
Mar 201612918
Apr 201631117
May 2016151420
Jun 2016161630
Jul 2016161722
Aug 201619517
Sep 2016321721
Oct 2016501442
Nov 2016599431
Dec 2016131717
Jan 2017261617
Feb 201751734
Mar 201733713
Apr 201743112
May 201714025
Jun 201763523
Jul 2017424217
Aug 2017403325
Sep 2017423621
Oct 2017262221
Nov 201738269
Dec 2017857725
Jan 2018413920
Feb 2018817519
Mar 2018776629
Apr 20181019718
May 2018837425
Jun 2018776523
Jul 2018784618
Aug 2018695125
Sep 2018432523
Oct 2018654935
Nov 2018433748
Dec 2018362232
Jan 2019441824
Feb 2019362029
Mar 2019422835
Apr 2019332336
May 2019423121
Jun 2019232328
Jul 2019483533
Aug 2019403634
Sep 2019383733
Oct 2019403132
Nov 2019353539
Dec 2019504832
Jan 2020333238
Feb 2020635338
Mar 2020312840
Apr 2020403824
May 2020797120
Jun 2020282743
Jul 2020211522
Aug 2020191916
Sep 2020534521
Oct 2020634211
Total521624762164