THE HAGUE — A Dutch appeals court on Tuesday upheld a landmark ruling that ordered the Dutch government to cut the country’s greenhouse gas emissions by at least 25 percent by 2020 from benchmark 1990 levels.
‘‘Considering the great dangers that are likely to occur, more ambitious measures have to be taken in the short term to reduce greenhouse gas emissions in order to protect the life and family life of citizens in the Netherlands,’’ the court said in a statement.
The original June 2015 ruling came in a case brought by the environmental group Urgenda on behalf of 900 Dutch citizens. Similar cases are now underway in several other countries.
Cheers and applause rang around the packed courtroom as Hague Appeals Court Presiding Judge Marie-Anne Tan-de Sonnaville rejected the government’s appeal. The court said the government is under a legal obligation to take measures to protect its citizens against dangerous climate change.
The ruling came a day after the Nobel Prize-winning Intergovernmental Panel on Climate Change issued an urgent report saying that preventing even just an extra single degree of heat in Earth’s climate could make a life-or-death difference in the next few decades for multitudes of people and ecosystems.
Marjan Minnesma of Urgenda hailed the Dutch ruling as a significant victory that will boost similar legal initiatives elsewhere in the world.
‘‘We won on every single point. And it was a very good explanation of the urgency of what is necessary and that states in industrial countries should do between a 25 to 40 percent CO2 reduction,’’ Minnesma said after the ruling.
‘‘The court also said maybe 40 percent is necessary but in this case we only asked for 25 percent so they didn’t make a judgment on that,’’ she added. ‘‘But they clearly said that climate change is a very urgent problem with enormous risks so the state should do at least the minimum.’’
Since the original judgment, a new Dutch government has pledged to reduce emissions by 49 percent by 2030, but it has yet to nail down exactly how to reach that target. Urgenda argues that the government — and other countries — need to do more sooner than 2030 to prevent serious consequences of climate change.
Minnesma had a few suggestions for lawmakers, such as lowering the maximum speeds on some Dutch highways and shutting down coal-fired power stations.
The government appealed the original ruling, saying that it effectively meant a court was formulating government policy. But the court rejected that argument, saying that judges must uphold treaties such as the European human rights convention, to which the Netherlands is a party.
In a statement following Tuesday’s decision, the government said it would study the ruling ‘‘with an eye on possible further appeal,’’ but at the same time pledged to carry out the court’s order. It said a recent assessment suggested that the target of a 25 percent reduction of emissions by 2020 ‘‘is within reach.’’
The UN panel on climate change said Earth’s weather, health, and ecosystems would be in better shape if world leaders could limit future human-caused global warming to just 0.9 degrees Fahrenheit from now, instead of the globally agreed-upon goal of 1.8 degrees.
To limit warming to the lower temperature goal, the world needs ‘‘rapid and far-reaching’’ changes in energy systems, land use, city and industrial design, transportation, and building use, the report said. Annual carbon dioxide pollution levels would have to drop by about half by 2030 and then be near zero by 2050.