The world is full of house dust mites.

The lives of honeybees are shortened – with evidence of physiological stress – when they are exposed to the suggested application rates of two commercially available and widely used pesticides, according to new Oregon State University research.

The first city-wide health impact assessment of the estimated effects of a tree canopy initiative on premature mortality in Philadelphia suggests that increased tree canopy could prevent between 271 and 400 premature deaths per year.