"The window to 1.5°C is still open, but it is closing fast, so urgent climate action is needed," the association says in a statement, in which it cites a recently released report by Climate Analytics.

According to the report European Union (EU) policies and the recent "REPowerEU" strategy, are not sufficient, but if it changes some targets it can meet the Paris Agreement and some of its objectives even ahead of schedule.

"To limit the average temperature increase by 1.5°C, the EU should aim to reduce its net emissions by 66% to 77% by 2030 from 1990 levels, instead of the current 55%," the statement said.

According to Zero, this ambition is "technically and economically possible" if there is also a rapid increase in renewable energy, based mainly on wind and solar power, in the coming decades.

In the case of Portugal, the reduction of emissions would have to be at least 61 percent by 2030 in relation to 2005 levels, instead of the current 55 per cent predicted by the Climate Framework Law.

The environmental association also stresses that "the transition to a more electrified and efficient energy system allows the rapid elimination of fossil fuels from the energy system".

The goal is for renewable energies to supply between 48 to 54 per cent of final energy demand by 2030, and between 92 to 100 percent of final energy demand by 2050.

Zero also mentions the introduction of green hydrogen to decarbonise sectors that are difficult to reduce emissions, such as long-distance, air and sea transport, as one of the changes compatible with the 1.5°C goal to meet the Paris Agreement.

Another key element is the "rapid electrification of industrial, heating and transport processes, based on a rapid increase in solar photovoltaic and wind capacity, and achieving a fully renewable energy system by 2040".

According to the Climate Analytics report, cited by Zero, it would be enough to increase current installed capacity by 25% for the EU to implement these measures.

However, the association insists that, although there are already tools available and ready to be put into practice, "the EU's climate action is not in line with the level of ambition needed to meet the Paris Agreement".

Referring specifically to the "REPowerEU" strategy, they state that the planned actions remain between 280 and 770 million tonnes of carbon dioxide and would have to be reduced in order for the EU's climate targets to be compatible with the 1.5°C temperature increase limit.

Zero also notes that all of the scenarios compatible with this goal provided in the report were developed before the war in Ukraine and the ensuing energy crisis.

"In the current context, renewable energy is even more cost-effective than in the scenarios analysed, and the rationale for its rapid development is even stronger," they stress.