Climate experts are calling for much stronger emissions-reduction targets for Australia to ensure global warming remains well below two degrees Celsius.
Coinbase has made a rousing debut on Wall Street, with shares of the digital currency exchange rising so high that the company briefly had a market value over $US100 billion ($A130 billion).
A "critical alert" has been issued to Australian organisations using Microsoft Exchange to send and receive emails after the tech giant found significant new vulnerabilities.