Hundreds of thousands of people are expected to join worldwide demonstrations this week ahead of a U.N. climate summit in New York, as unions and some businesses lend their support for faster action to fight climate change.

Organizers said Monday that more than 800 events were planned in the United States for Friday’s “global climate strike,” while in Germany over 400 rallies have been registered. Campaigners are also staging protests in most other European countries, Australia, Japan, India, South Africa, Canada and dozens of other locations. It follows a similar coordinated protest in March that drew many tens of thousands around the world.

“This is an important signal,” said Antje von Broock, a spokeswoman for a broad alliance comprising some 200 environmental, youth and church groups in Germany, noting that the demonstrations will take place just days before the U.N. climate summit, where leaders will present their long-term plans for curbing greenhouse gas emissions.

Climate change has become an increasingly important issue for voters in recent years, particularly in Europe. In Germany, Chancellor Angela Merkel’s government plans to announce a package of measure s that would put the country on course to cut its emissions 55% by 2030 compared with 1990 levels.

A report released last year by a U.N. science panel concluded that there’s still a chance to meet the 2015 Paris climate accord’s goal of keeping global temperatures from rising more than 1.5 degrees Celsius (2.7 degrees Fahrenheit) by 2100 compared with pre-industrial times. But achieving this would require drastic measures, including ending the use of fossil fuels such as oil, gas and coal by mid-century.

ABC