Feature
- Agriculture
Herbal Herbicides
Scientists are tapping plants, and the self-defense chemicals they make, for new weed killers, many of which may find use in organic farming.
- Health & Medicine
Long-Term Threat
Survivors of a childhood cancer face a sixfold risk of developing a new cancer later in life, compared with people in the general population.
- Earth
Not-So-Perma Frost
The world's warming climate, as well as ecological shifts in the timing and frequency of wildfires in boreal forests, pose an increasing threat to Arctic permafrost.
- Earth
Traces of Trouble
Scientists and engineers are investigating how to stem the flow of naturally-occurring and synthetic estrogens that, when released from waste water treatment plants and livestock operations, can harm aquatic life.
