Ski lifts idled above aspens, their leaves just beginning to show a tinge of yellow.

NEWYORKER: Alone

It says more fire retardant species like oaks, aspens and alders will be placed on the forest boundaries.

BBC: Burnt forest rises from the ashes

Dr Chiang therefore inserted into his aspens a gene that makes antimessengers to the lignin gene in question.

ECONOMIST: GM trees are on their way

The dampness in the air enhances the autumn colours in the landscape, the vibrant reds of the tundra and the gold of the aspens.

BBC: Journey into the Alaskan wild

They produced aspens, another species of poplar, that have 45% less lignin and 15% more cellulose than their wild brethren, and grow almost twice as fast, as well.

ECONOMIST: GM trees are on their way