Renewables accounted for more than 19% of the European Union’s energy consumption in 2019, just below the 20% binding target for 2020, according to the European Environment Agency. Power generated from green sources doubled from 2005 to 34% of production as member states move away from coal. Yet the pace of the green transition must accelerate to make good on the ambitious 2030 emissions goals.

“To meet these higher pledges, renewable power should grow to almost 70% of all EU generation by 2030 and to over 80% by 2050, allowing sectors that are harder to decarbonize to reduce their emissions through electrification,” the Copenhagen-based EEA said.

Higher carbon prices in the EU Emissions Trading System would help make renewable power sources more competitive, the EEA said. The cost of pollution in the world’s biggest cap-and-trade market has never been more expensive, rising to a record of 35.42 euros a ton last week.

Another challenge for policy makers will be tackling some adverse impacts of the shift to renewable power, the EEA said.

The report showed that the impact of solar power and the incineration of biodegradable municipal waste on freshwater worsened in 2018 compared with 2005. In addition to that, solar power and the increase in biomass use had a negative effect on land occupation.

That’s because manufacturing components and constructing plants requires significant amounts of material and energy, causing additional emissions. New infrastructure can also affect vulnerable habitats.