Low-emission air travel and a potential deal for Japan to help build the UK's next- generation Tempest fighter jet are set to take center stage at the annual Farnborough airshow this week.

After four years, executives from airlines and manufacturers will gather at the airport. The show, which usually happens every two years but was canceled in 2020 because of the coronaviruses, will start on Monday.

Even as they expect a resurgence in sales of commercial jets using fossil fuels, manufacturers have emphasized efforts to reduce planes' environmental impact, even as they expect hundreds of orders for new planes.

Rolls-Royce wants to prove the fuel can safely and efficiently deliver power for small to mid-size aircraft.

The Fokker business in the Netherlands will be part of a 112 million investment plan to work on high-voltage, high-power wiring.

Brazil's Embraer, a manufacturer of smaller passenger jets for regional travel, signed a deal with Raizen, a Brazilian energy company, to scale up production of sustainable aviation fuel. The aviation industry is betting on SAF to deliver net- zero flight for larger jets.

According to the first report, an announcement that Japan will join the project as a partner is on the horizon.

Italy's Leonardo and Sweden's Saab are involved in a joint venture. After France and Germany snubbed the UK, it was first announced at the last air show. The defence ministry of Japan has stated that it may be open to collaborating with other countries.

According to an analyst at Rusi, adding another country could spread development costs to the tune of £25 billion. The UK government announced last week that it was going to upgrade its radars.

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The government said on Monday that it had earmarked more than $300 million in public and industry funding for projects in the aviation industry. The funding is part of a partnership between the government and industry.

The government will publish a "drone ambition statement" setting out its aims for the sector and how it will change regulations to allow drones connected to 5G mobile networks and improve public communications.

Plans to use drones to deliver medical supplies to the Isles ofScilly and remote parts of Scotland are among the projects funded by the government.