An Egyptian government programme to pay traders to buy rice straw from farmers at the end of harvest has helped to combat one of Cairo's ugliest features - a huge black cloud that hangs over the capital during the burning season.
Cairo is the world's second most polluted megacity, the World Health Organization says, and the government is pursuing several initiatives to cut back greenhouse gas emissions.
One of the biggest contributors to the thick layer of smog has been the annual burning of rice straw by farmers who have no other means to dispose of it.
To tackle the problem, the government offered an incentive to traders to buy the straw from farmers amounting to 50 Egyptian pounds ($3) per tonne, said Mohamed Salah, head of the Egyptian Environmental Affairs Agency (EEAA). They can then sell it as animal feed or for other uses.
The programme appears to be bearing results.
"Today, the dark cloud season is over and all citizens in Egypt are saying that they have not sensed any significant problem relating to this, unlike what had happened in previous years," Salah said.
An industrial boom in Egypt has also contributed to pollution, Salah said.
"We have some small industries that are deregulated and are not in line with environmental standards. We have worked hard on these," he said.
(Reporting by Mohamed Zaki and Yousef Saba; Writing by Yousef Saba; Editing by Angus MacSwan)
(With inputs from agencies.)