La verdad sobre el cambio climático

EXETER – Mucha gente pregunta cuán seguros estamos sobre la ciencia del cambio climático. El análisis más definitivo de la evidencia científica ha de encontrarse en el trabajo del Panel Intergubernamental sobre el Cambio Climático (IPCC, tal su sigla en inglés) y su último informe de relevancia publicado en 2007. Yo tuve el privilegio de presidir o copresidir las evaluaciones científicas del Panel entre 1988 y 2002.

Muchos cientos de científicos de diferentes países participaron como colaboradores y revisores de estos informes, que probablemente sean las evaluaciones internacionales más integrales y minuciosas sobre cualquier tema científico que alguna vez se hayan llevado a cabo. En junio de 1995, justo antes de la cumbre del G-8 en Escocia, las Academias de Ciencia de las 11 economías más grandes del mundo (el G-8 más India, China y Brasil) emitieron un comunicado respaldando las conclusiones del IPCC e instando a los gobiernos mundiales a emprender una acción urgente para abordar el cambio climático. Los principales científicos del mundo no podrían haberse expresado de manera más contundente.

Desafortunadamente, fuertes intereses personales han invertido millones de dólares en difundir desinformación sobre el cambio climático. Primero, intentaron negar la existencia de cualquier evidencia científica sobre el calentamiento global. Más recientemente, en gran parte han aceptado la realidad del cambio climático antropogénico (fabricado  por el hombre), pero sostienen que sus impactos no serán grandes, que podemos ampquot;esperar a verampquot; y que, en cualquier caso, siempre podemos solucionar el problema si resulta ser sustancial.

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