② The main minerals in Brazil are tungsten, manganese, coal, oil and iron. Brazil's main crops are corn, cocoa, cotton, soybeans, coffee, sisal and so on;

(3) Brazil has the largest area of tropical rain forest in the world. Once this resource is destroyed, the global temperature will rise.

So the answer is: (1) heat; Most of Brazil lies between the equator and the tropic of Capricorn. (2) iron; ? Coffee; Sugarcane; Bananas; Sisal (any two kinds); (3) tropical rain forest; Raise.