The cannabis industry will see $40 billion in annual sales by 2025.
Malaysia's last Sumatran rhino has died of cancer in captivity.
Many incentives can lower the cost of solar make it more competitive with other forms of energy generation.
Air pollution is a potent killer. It has been linked to a variety of health conditions from coronary disease to strokes.
Emissions of the greenhouse gas nitrous oxide have been on the rise in this new century, scientists say.
Ancient Egyptians mummified countless African ibises so that these birds could be sacrificed to their god Thoth.