Tesla Inc's aggressive price cuts have ignited demand for its electric vehicles, Chief Executive Elon Musk said on Wednesday, playing down concerns that a weak economy would throttle buyers' interest.

The World Health Organization has called for "immediate and concerted action" to protect children from contaminated medicines after a spate of child deaths linked to cough syrups last year.

Pakistan's government said it was scrambling to restore power to millions of people on Monday after a breakdown in the grid triggered the worst electricity outage in months and highlighted the weak infrastructure of the heavily indebted nation.

Fire swept through part of a shanty town in the South Korean capital, Seoul, on Friday, destroying 60 homes, many constructed from cardboard and wood, and forcing the evacuation of around 500 people.

Greta Thunberg called on the global energy industry and its financiers to end all fossil fuel investments on Thursday at a high-profile meeting in Davos with the head of the International Energy Agency (IEA).

Their head-mounted flashlights swaying in the darkness, workers at the Bodega Andres Morate vineyards resemble fireflies from a distance as they roll their wheelcarts from one vine to another cutting grape bunches at night.

South Koreans may soon be able to carry a device inside their own bodies in the form of a bespoke tattoo that automatically alerts them to potential health problems, if a science team's project bears fruit.