Identify sources that support the global warming's effects on the ecosystem.

I think
that the issue of global warming has become so politicized on both sides that one of the
fundamental concerns is going to be how one can assess the validity of different sources.  The
truly "great" source might be one that is replete with coherent analysis and is more
dispassionate about its presentation of the effects of global warming on the ecosystem.  In this
light, I tend to think that the National...