According to Harriet Thompson, the UK's High Commissioner to Ghana, by 2050, more than 70% of Ghana's cocoa-growing areas would no longer be fit for that use.
If the country's temperatures continue to increase as they are today, according to her, this will take place.
On November 29, after visiting Dr Owusu Akoto Afriyie, Minister of Food and Agriculture, as a courtesy, Madam Thompson tweeted this.
The purpose of the courtesy call was to give the two of them a chance to discuss important agricultural concerns, particularly Ghana's climate-smart agriculture and the United Kingdom's support for it.
Madam Thompson said "Over 70% of land currently used to grow cocoa in Ghana will not be suitable for that crop by 2050 if temperatures continue to rise as they are doing currently.
"Now is the time to adapt – and the potential to do so is great."