Pantheism has been Hollywood’s religion of choice for a generation now.-- from an interesting piece by Ross Douthat on Avatar and film culture. But he misses the point that although human life is often tragic there is not necessarily something tragic in vesting concern in the health of a whole ecosystem.
For example, Greg Carr's attempt to restore Gorongosa National Park in Mozambique (as reported by Philip Gourevitch) may fail but the tragedy would be not to try.
P.S. 13 Jan: Carlo Artieri on the Biology of Avatar, Ben Schott on the Na’vi language and George Monbiot on invisible genocides.
P.P.S 14 Jan: Tetrapod Zoology guide here.