spreading diseases

Urban residents tripled, half of the world's population has no water to use, millions of starving people ... are problems that the Earth may face in the next four decades. .

With more than 700 visitors and guides conquering Mount Everest each year, their waste is polluting and becoming a health threat.

A new scientific report is controversial after calling on doctors to stop shaking hands with patients, citing the reason that this action is as harmful as smoking in public places.