By the end of the decade, United Airlines hopes to have electric aircraft flying regional routes.

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Heart Aerospace, a Swedish start-up, is developing the battery-powered aircraft, for which United has placed an order for 100 planes in July 2021.

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United has invested heavily in low-emission aviation, not only announcing plans to purchase electric air taxis and vertical aircraft.

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"We cannot continue to do and operate our business in the same way; we must change."

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"Existing technology will either force us to fly less, which we believe is an unacceptable alternative, or continue with a carbon footprint, which we also believe is unacceptable,"

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Heart Aerospace, which recently redesigned its first electric aircraft, now known as the ES-30, expects the planes to enter service in 2028.

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The 30-passenger planes will be powered by electric motors powered by battery energy, giving them a fully electric range of 200 kilometres.

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The planes will also have a reserve-hybrid engine powered by sustainable aviation fuel, allowing them to fly for up to 400 kilometres on a single charge.

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Heart Aerospace has also received purchase orders from Air Canada, Mesa Air Group, and Icelandair, and has received investment from Bill Gates' foundation.

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"At first, we want to fly on routes of 200 miles or less," he said. "However, as energy density increases, the same aircraft will have a range of 250 miles, 300 miles, or more."

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