The "stadium in a rain forest" is actually in a city of 1.8 million people. Beautiful Manaus.
Yes, the weather is rainy for 3 months, not now usually, and yeah, it is expensive and likely a white elephant as many stadiums built all around the world, but can't we celebrate accomplishments for a change instead of distorting the facts in order to mock the accomplishments and efforts of others?
http://newswatch.nationalgeographic.com/2013/09/27/how-do-you-build-a-stadium-in-the-rainforest/
"To Brazil, the costs are worth it. This is the countrys one shot to show off its diverse geography and culture, especially the attractive pockets outside of the shiny cities.
Its important to be skeptical about building in such an ecologically rich area. History has shown that cities that invest heavily in infrastructure for global sporting events are usually left with big shrines of excess, often adjacent to people who need homes and food, not high-priced concert venues. That said, I do see the enchanting novelty of a stadium in a rainforest. Properly addressing the environmental impacts of sun, rain, and humidity could make it a mighty unique place to take in a match of soccer."