Chocolate lowland climate in the narrow band of latitudes where cacao is grown (20 degrees north and south of the equator), the commercial company Mars, Incorporated and the University of California, Berkeley are conducting genomic research in 2017–18 to improve the survivability of cacao plants in hot climates. Chocolate is made from cocoa beans, the dried and fermented seeds of the cacao tree ("Theobroma cacao"), a small, 4–8 m tall (15–26 ft tall) evergreen tree native to the deep tropical region of the Americas. Recent genetic studies suggest the most common genotype of the plant originated in the Amazon basin and
Theobroma cacao cacao" through a process of steps that involve harvesting, fermenting of "T. cacao" pulp, drying, harvesting, and then extraction. Roasting "T. cacao" by using superheated steam was found to be better than conventional roasting (use of ovens) because it resulted in same quality of cocoa beans in a shorter amount of time. In 2016, world production was 4.5 million tonnes, led by Ivory Coast with 33% of global production and Ghana with 19% of the total (table).. The pests and diseases to which cacao is subject, along with climate change, mean that new varieties will be needed to respond to