Russia and Canada are also oil rich, they are the countries with less incentive to stop burning fossil fuels. Russia not only makes money selling and using oil but it will make their country greener too.
Global warming is legit but the consequences are unknown. Hotter oceans will cause more rain to fall, for example, while evaporation will increase in some places, hence some places will become drier and others will be wetter. Brazil is not any drier right now than in the 19th century, when records start. Plant breeding has created incredibly resilient plants for tropical climates. Soybeans are originally a temperate plant, well suited to the american plains, not to Mato Grosso, or western Bahia. Embrapa already got some wheat varieties able to grow in the Cerrado region. You also have vineyards bordering the Amazon.
The problem will be Africa because they do not have the technology and while they have, in some areas, a climate similar to Latin America it's not exactly the same. Plants can be sensitive, a seed that will grow well in Mato Grosso may not develop as well in Góias, much less in the Congo.
There is also the economics, a large advantage of Brazil is that it's an urban country, there are few smallholders, farms are large and benefit from economies of scale. You find many 5 hectares farms in Europe, 50 hectares farms in the US and 1 hectare farms in Africa that are worked by hand and where a simple tractor isn't worth it.
