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
Cabécar people are among the tallest trees often found in Cabécar tropical home gardens. Lower strata include permanent crops such as coffee ("Coffea arabica") and cacao ("Theobroma cacao"). The lowest stratum is characterized by medicinal plants, shrubs, and tubers, including chili pepper ("Capsicum annuum"), manioc ("Manihot esculenta"), and tiquisque ("Xanthosoma violaceum"). The Cabécar maintain their tropical home gardens by removing undesired underbrush to allow for growth of wild species that can also be harvested to supplement Cabécar everyday needs. Cabécar subsistence farmers practice rotating slash-and-burn agriculture for basic food requirements. This technique is employed during the driest month to clear dense underbrush