STORY: Here's five business stories making headlines in sub-Saharan Africa this week.

Central African Republic has adopted bitcoin as an official currency, the presidency said on Wednesday (April 27), in a bid to open up, quote, "new opportunities for our country".

It's only the second country in the world to embrace in the cryptocurrency, and the first in Africa.

Zambia is close to finding an investor for Mopani Copper Mines, President Hakainde Hichilema said on Monday (April 25).

The government took on $1.5bln in debt to buy Mopani from Glencore last year and has been looking for an investor since in order to ramp up production.

South Africa's efforts to establish a green economy will need funding of more than one trillion rand, or over $63 billion, by 2030 a top government official said on Tuesday.

In November the U.S, Britain, France, Germany and the E.U. agreed to offer an $8.5bln package to help South Africa wean itself away from coal.

Botswana's central bank raised its main lending rate on Thursday saying it now expected inflation to fall back within its target range of 3-6% in the first quarter of 2023, compared with a previous forecast of the third quarter of 2022.

And finally Kenya's Nairobi Securities Exchange is looking to buy up more stakes in bourses across Africa, it's chief executive said on Monday, with a view to eventually becoming a pan-continental exchange.

Africa's fifth biggest bourse by market capitalization already owns a stake in neighboring Tanzania's Dar es Salaam Stock Exchange and, CEO Geoffrey Odundo said, is eyeing others in countries liker Nigeria and Botswana.