Medically reviewed by Soma Mandal, MD Orthopnea is the sensation of breathlessness when lying down that goes away when ...

I n 1989, the National Aeronautics and Space Administration (NASA) published a promising study claiming that houseplants purify indoor air. Its results suggested that certain comm ...

Unfortunately, more recent studies — in particular, a review from experts at Drexel University published in the journal ...

The head of the U.N. atomic watchdog said Tuesday he will visit Moscow in the coming days to speak with officials about ...

As an additional means of meeting these targets, the Kyoto Protocol introduced three market-based mechanisms, thereby creating what is now known as the carbon market. Stimulate sustainable development ...