Explain one way that climate affects trade for both Brazil and Cuba

Sugar historically has been the country's main export. In the early 21st century, Cuba also benefited from a joint venture with Venezuela, which shipped petroleum to Cuba for refining and reexport. In the process, refined fuels vied with sugar to be Cuba's top export. Nickel and other minerals, pharmaceutical products, tobacco (notably cigars), and beverages along with food and food products (including fish and citrus fruits) are also important exports. Among the most important imports are mineral fuels and lubricants, foods, machinery and transport equipment, and chemicals. Cuba's main trading partners include Venezuela, China, Spain, Canada, Argentina, Brazil, and the Netherlands.