In another resolution, the group called on the EU to submit a strategy to the UN Convention on Climate Change for reaching carbon neutrality by 2050. The European Commission has already proposed a 2050 carbon neutrality goal, but the opposition of Poland, Hungary and Czechia has stopped it from earning the endorsement of the European Council.

The votes come less than one week before countries are set to gather in Madrid for the UN COP25 Climate Change Conference.

"The fact that Europe is the first continent to declare climate and environmental emergency, just before COP25, when the new commission takes office, and three weeks after Donald Trump confirmed the United States' withdrawal from the Paris agreement, is a strong message sent to citizens and the rest of the world," French liberal Member of European Parliament (MEP) Pascal Canfin, who wrote a draft of the climate emergency resolution, said, according to The Guardian.

Some climate activists applauded the European Parliament's emergency declaration, but also urged the EU to back up words with deeds.

"We can't solve a crisis without treating it as one," Swedish school-strike leader Greta Thunberg tweeted from the Atlantic Ocean, as she sails back from North America to attend COP25. "Let's hope they now take drastic sufficient action."

Greenpeace EU climate policy adviser Sebastian Mang shared a similar sentiment before the vote.

"Our house is on fire. The European parliament has seen the blaze, but it's not enough to stand by and watch," Mang said, according to The Guardian.

The first resolution was adopted 429 to 225 with 19 abstentions, and the second passed 430 to 190 with 34 abstentions.

The votes came a day after European Commission President-elect Ursula von der Leyen, the first woman to lead the EU's executive arm, pledged that the EU would be the first continent to reach net zero emissions by 2050, The Washington Post reported. She has promised a European Green Deal, which the commission will draft within 100 days of taking office in December.

"If there is one area where the world needs our leadership, it is on protecting our climate," she said, as The Washington Post reported. "This is an existential issue for Europe — and for the world."

The European Parliament's resolutions Thursday will put additional pressure on her to make good on her promises, and even increase them. Von der Leyen has proposed a goal of reducing greenhouse gas emissions to at least 50 percent of 1990 levels by 2030, but the second resolution called on her to make that a 55 percent reduction. The current target is 40 percent, which activists and Green politicians argue is not ambitious enough, according to The Guardian.

A UN study released this week warned that greenhouse gas emissions must decline 7.6 percent every year for the next decade in order to limit global warming to 1.5 degrees.