内容摘要：Capivasertib, which was developed by experts at Velindre Cancer Centre and Cardiff University, became available to breast cancer patients on the NHS in April.

Capivasertib, which was developed by experts at Velindre Cancer Centre and Cardiff University, became available to breast cancer patients on the NHS in April.

And it is not just small businesses it deals with.In May of 2024, the NGO signed a contract with the Mexican and Central American division of the retail giant Walmart.

This contract guarantees a flow of used cooking oil and grease from all companies related to Walmart to Sustenta, which Mr Pineda says is critical to Sustenta's project."We needed a reliable flow to scale up production. (...) Otherwise, we could quickly run out of used cooking oil, because of the black market that is competing with us," adds Mr Chávez.It then brings the cooking oil and grease to a plant in Comayagua, where they are purified and processed in a reaction known as saponification. This process combines fats or oils with an alkali to produce soap.

Mr Pineda says that Sustenta is keen to develop "a circular ecological system in which we reuse everything"."Next to our plant that produces the soap and dog food, someone else has a water purification plant and we use the water that plant cannot purify, its waste so to say, for our water cooling system," he explains.

The idea of teaming up with Walmart, Mr Pineda says, is "to sell the dog food and soap we have refined from their waste at Walmart".

"They could profit from their own waste and also see the economic value behind circular economies, " he tells the BBC.The potential move has been labelled "wildly illegal" by some members of the rival Democratic Party - something the White House denies - and it has attracted criticism from some of Trump's supporters.

Qatar itself earlier said the reports about the plane were "inaccurate", and that negotiations were continuing.The news comes as Trump visits several countries in the Middle East, including Qatar.

BBC Verify has been looking into the legality of presidents accepting gifts.On Sunday, US media reported that the Trump administration was preparing to accept a Boeing jumbo jet from the Qatari royal family - saying that the plane would be refitted and used temporarily as Air Force One, the name for the plane used by presidents.