The tree line is moving up mountains at a rate of half a meter a year, say researchers from Krasnoyarsk Science Centre, part of the Siberian Branch of the Russian Academy of Sciences.

Dust. Trees. Grasses. Mold. How to read the signs about whether 2016 will be gentle or monstrous for allergy sufferers.

Garden writer Jeff Lowenfels asks whether there is more matter falling from birch trees late this summer than in previous years,