They collected branches from nine tree species—silver birch, yew, elder, maple, ash, cherry, beach, hawthorn, and nettle—and washed the leaves to rid them of existing particles.

We set up a row of 24 young silver birch trees in tubs along the pavement of the busy A9 in Lancaster. Behind the trees were 4 terraced houses, and next to those, 4 identical terraced houses that ...

Silver birches are among the best trees for small gardens since they never produce too dense a canopy and their root systems are unlikely to shift foundations. That said, always make sure they are ...