Causes of conjunctivitis. Causes of conjunctivitis include: Bacterial or viral infection. Infection with a virus that may also cause a fever and sore throat. Sexually transmitted infections (STIs), including chlamydia and gonorrhoea. Irritants such as chlorine from swimming pools, shampoo, smoke, fumes or a loose eyelash.
India is on track to become the worldâs most populous nation in less than a decade â or six years earlier than previously thought, according to the U.N. With 1.38 billion people compared with Indiaâs 1.31 billion, China is currently the worldâs most populous country. Figures for both countries are expected to swell to around 1.4 billion by 2022, at which point Indiaâs population is likely to expand beyond Chinaâs.
By 2040, India's population is expected to be 1.52 billion; that same year, China's will be 1.45 billion and India will become the world's most populous country. As of 2005, India has a total fertility rate of 2.8, well above replacement value, so it is growing much more quickly than China.s the world's population is approximately 6.7 billion, China represents a full 20% of the world's population so one in every five people on the planet is a resident of China. China's population growth has been somewhat slowed by the one child policy, in effect since 1979.