HEIDELBERG APPEAL QUIETLY GAINS WORLDWIDE SUPPORT he Heidelberg Appeal was puhlir Iv released at the 1992 Earth Summit in Rio de Ianeiro. 8v the end of the I992 summit, 425 and other intellectual leaders had signed the appeal. Since then, word of mouth has prompted hundreds more scientists to lend their sup- port. Today. more than 2,700 signatories. including dozens ot Nobel Prize winners, from 102 countries have signed it. In spite at this spontamxius and growing support from the world's scienti?c community, the Heidelberg Appeal has received very little media attention. Neither a statement of corporate Inter- ests nor a denial of envuronmental prob- lems, the Heidelberg Appeal (see panel to the right) is a quiet call for reason and a recognition of scienti?c progress as the solution to, not the cause of, the health and environmental problems that we face. The appeal expresses a conviction that modern society is the best equipped in human history to solve the world's ills, provided that they do not sacri?ce sci- ence, intellectual honesty and common sense to political opportunisrn and irra- tional fears. ATMOSPHERIC UPDATE: uchoitl?ieddmeconoeming Melimtechangehasbeendriven bythepmiectionsotorxnputer In additiontopredicting futureglobaltem- renttemperatures. Increasingly, scien- ferenoebetmenwhatthemodelssay tt'ietemperamreshouldbemdwha observationalnwementsacmally indicate. Areoentscienttficstudy,? thatgowthrimtmm??n-yenr-old aleroetreeinSouth/tnuicutwm year,indicadMNuicW mmMnottpasthermdels predict 'l?hisddamdulislhel?aatha mottheohservatiomld?apoimb mmummh a'public' computer ?leforatmospher- abroad. t993wastour-tenthsof mdeyeeFalueerowerthanthe Io-yu'mtorAprit. newsman-emit? magnum-mm?. tun- ew Policy 1mm! Inn! ?or mnmental assessment requirements to cover greenhmse gas emissions. Several impor- tant questions ome to mind in cmtemplat- ing the administration's actions in this area (see panel on the right), especially since the current climate convention, which has been agreed to by I60 countries and rati?ed by the US. Senate, was designed to recognize the l'dtft'erent circumstances" among coun- tries, and was intentionally crafted to allow ?exibility among nations so that 'cost-effec- tive? and creative solutions could be found to enhance the reduction of greenhouse gases The Mimi does not edahlish tam or timetables for emission reduc- tions. Further, there was recognition that the United States, which invests over $100 billionayear intheenvirmment. hadmade signi?cant strides in reducing its emissions, while developlrg countries' emissions will grow~perhaps to 70 percent ofthe world's total by the year 2025. . Wham" belowlbto-yurm octoh?crrmaumm them attributes this coolingtrend tothee?ectsofMount Pinatbo?serup- tlonlnlune 1991. Millionsofmof acid. Theseaerosolsre?ectedsolar Ptnatubo'seool- wereitnotiortheEl Nino,avastpool ofwatm water that sometimesiorms in d?tetmpical central Paci?c. Still present. thispoolbeganlormingin t990and mwmum Wmdombm tionlevels ?Maui-com mannayamdthem. As Gw?ypotmomhomm Madman-tram? ?Number-rush mum-o s. NATIONAL AIRPORT '3 81mm INDUs IN CALLS IOR INTEGRITY (IIHLIK It . PROJI (I WILL MAJOR AIR (Imus mum .I II. IN. I WI.- mum I--I-.II I II II