People and animals were left ill and the huge amounts of untreated effluent killed thousands of fish.
London mayor Sadiq Khan commissioned the report and vowed to tackle air pollution.
Improving air quality has become a priority for the government in Beijing.
The utility’s punishment for pumping more than a billion litres of raw sewage into the water must be ‘sufficiently large that they get the message’, said a judge.
Severe bleaching is killing coral in Australia’s Great Barrier Reef.
The first "very high" pollution alert has been issued for London by mayor Sadiq Khan, under a new system for warning people about poor air quality.
Hundreds of doctors, nurses and other health workers are calling on the Prime Minister to take action to get polluting diesel vehicles off the UK's roads as soon as possible.
The UK faces being taken to court over air pollution after the European Commission sent a "final warning" for repeated breaches of legal limits in parts of the country.
Air pollution which plagues the UK threatens the human rights of children, a United Nations expert has warned.