Propolis is a resinous substance collected by bees from certain plants. It is used by bees to seal the openings of hives, maintain hives and to keep free from germs. Propolis is not only good for maintaining beehives, it has become a popular nutritional supplement and is used by many people to assis..
According to the World Health Organization (WHO), Air pollution killed 7 million people across the globe in 2012, making it the world's largest single environmental health risk. The worst victims were in low and middle-income developing countries in South-East Asia and the Western Pacific. The serio..