Ukrainian President Volodymyr Zelenskyy spoke to the U.K.'s parliament Tuesday, asking it to increase the pressure of sanctions and "make our Ukrainian skies safe."

Zelenskyy has been asking NATO and the West to enforce a "no-fly" zone over Ukraine, but the U.S. and its allies have declined the request.

The Ukrainian president was greeted with rousing applause from members of the House, who stood before he spoke.

In his speech, Zelenskyy quoted Shakespeare, saying, "We have to be or not to be. This is a Shakespearean question. Not that I have the answer, but…Yes it is to be."

He also paraphrased the words of Winston Churchill.

"We will not give up. We will continue fighting for our land whatever the costs. We will fight in the fields, in the seas, in the streets. We will fight on the banks of different rivers," Zelenskyy said.

"We do not want to lose what we have," Zelenskyy said.

-ABC News' Joe Simonetti and Matt Gutman

The European Commission on Tuesday released its proposed plan to make the European Union independent from Russian fossil fuels before 2030, starting with gas.

The plan "will seek to diversify gas supplies, speed up the roll-out of renewable gases and replace gas in heating and power generation," according to the European Commission.

This plan could reduce the EU's demand for Russian gas by two-thirds before the end of the year, according to the European Commission.

"We must become independent from Russian oil, coal and gas. We simply cannot rely on a supplier who explicitly threatens us," European Commission President Ursula von der Leyen said in a statement.

Von der Leyen said she would be discussing the Commission's proposal with European leaders in Versailles later this week.

"Putin's war demonstrates the urgency of accelerating our clean energy transition," the European Commission wrote on Twitter.

Just before the invasion of Ukraine, the EU reported wholesale gas prices were around 200% higher than a year ago. The invasion aggravated the energy crisis even further.

The EU said it is reliant on imports of fossil fuels— gas, oil and coal— to meet its needs.

Last year, Russia provided around 45% of the EU's total gas imports, 27% of the EU's total crude oil imports and 46% of the EU's hard coal imports, according to the European Commission.

-ABC News' Christine Theodorou

The United States will ban imports of Russian oil and other energy products but will not be joined in doing so by European allies, President Joe Biden announced Tuesday.

“Today, I'm announcing the United States is targeting the main artery of Russia's economy," Biden told reporters during a press conference from the White House. "We're banning all imports of Russian oil and gas and energy."

Biden said the ban means the U.S. "will deal another powerful blow" to Russian President Vladimir Putin amid his invasion of neighboring Ukraine. The move is also expected to trigger sharply higher gasoline and other energy prices in the U.S. and worldwide.

"There will be cost as well here in the United States," he added. "Republicans and Democrats understand, alike, understand that."

The decision was made in "close consultation" with U.S. allies and partners around the world, particularly in Europe, according to Biden.

"Because a united response to Putin's aggression has been my overriding focus, to keep all NATO and all the EU and our allies totally united," he said. "We're moving forward, understanding that many of our European allies and partner may not be in a position to join us."

-ABC News' Ben Gittleson and Molly Nagle

The United Kingdom will phase out the import of Russian oil and oil products by the end of the year, as part of its sanctions on Moscow for invading Ukraine, U.K. Buiness Secretary Kwasi Kwarteng announced Tuesday.

"Beyond Russia, the vast majority of our imports come from reliable partners such as the US, Netherlands and the Gulf. We’ll work with them this year to secure further supplies," Kwarteng said on his official Twitter account.

Kwarteng noted that while the U.K. "is not dependent" on Russian natural gas, as it only makes up 4% of the U.K's supply, he is exploring options to "end this altogether."

"The market has already begun to ostracise Russian oil, with nearly 70% of it currently unable to find a buyer," he added.

-ABC News' Joe Simonetti

U.S. Secretary of State Antony Blinken crossed the border into Ukraine Saturday after meeting with Ukrainian Foreign Minister Dmytro Kuleba at the Korczowa Border Crossing Point.

"The entire world stand with Ukraine," Blinken said, and Kuleba added that he hopes Ukrainians will see this as a "clear manifestation that we have friends who literally stand by us."

Blinken said the sanctions imposed so far against Russia are "producing very, very concrete results" and that the pressure will "grow" until this "war of choice is brought to an end."

When asked directly about helping Kuleba with more firepower, Blinken said, "the support for Ukraine not only has been unprecedented, not only is going to continue, it's going to increase."

Kuleba said Ukraine "appreciates" sanctions that have been announced in the last week, but that more economic and political pressure and "necessary weapons," would "save many lives in Ukraine... many sufferings will be avoided."

Kuleba also said that they are “satisfied" with already arranged supplies of anti-tank weapons and ammunition, but that “it’s no secret” they still want fighter jets and air defense systems.

He also thanked the U.S. for sending stingers, and said they were used on Saturday.

"Just today we shot down three Russian attack aircrafts, which were bombing our cities with the use of stingers but we need -- so to say -- big air defense systems to ensure the safety of our skies. If we lose the skies, there will be much, much more blood on the ground,"Kuleba said.

In response to questions about NATO’s refusal to impose a no-fly zone over Ukraine, Kuleba said it’s a "sign of weakness," but stayed optimistic that they will change their minds.

"The time will come," he said.

-ABC News' Conor Finnegan and Justin Gomez