Olympic organisers are "seriously concerned" about the spread of coronavirus and the impact it could have on the Tokyo Games.
Experts say China's recent measures have created a chance to stop the virus becoming a global crisis.
The Shanghai index closes nearly 8% lower as investors weigh the impact of the outbreak.
Beijing wants people to use only real identities online but there is concern over data collection.
Rising winds could increase energy production from turbines by a third over the next decade.
Retailers are poised for bumper Cyber Monday sales in the US after a record-breaking Black Friday.
Fishing nets and rope were among the debris found inside the whale which stranded on the Isle of Harris.
Meng Wanzhou is fighting extradition to the US on charges of violating sanctions against Iran.
The incident took place in the early hours on the well-known Canal St, police said.
The 27-year-old's death in the southern city of Hyderabad has sparked furious protests.
France announces new action to counter domestic killings, but many of those protesting remain sceptical.
Northern parts of India have been blanketed in smog for weeks.
The case shocks Argentina as people accuse the Church of turning a blind eye.
The World Meteorological Organization says the levels of warming gases continue to reach new highs.
A professor's comment triggers an avalanche of criticism on Twitter from food lovers and immigrants.