The World Health Organisation says polluted air causes 7 million deaths globally each year.
The Philippines has shipped 1,500 tons of waste back to Canada, just days after Malaysia announced it would return 450 tons of imported plastic waste.
Citizens across 28 Europeans countries headed out last week to cast their votes in the European Union elections.
A student in Boston wrote, ‘I am from Hong Kong.’ Lots of mainland Chinese netizens got really angry
Frances Hui wrote a column for the Emerson College student paper that began with the line: "I am from a city owned by a country I don't belong to."
Protests were expected to be held in more than 1,600 places in 110 countries. The Hong Kong march will take place on Sunday.
The rare species is also found in China and Japan, but became extinct in Korea in the late 1970s.
Protest organisers are asking citizens to walk out of work ahead of a crucial United Nations summit and demand immediate action.
Protests in more than 1,400 cities expected to attract more than the 1.4 million people who took part on March 15 - but won't include Hong Kong students.
Mounting sanctions, mysterious rockets, Twitter showdowns and threats of force.
The lawsuit by the top Twitch streamer against his gaming organisation has sparked a debate about player welfare in the e-sports industry.