I'm very glad to see the commitment of the North Americans in assume the = guilt for them. Maybe I should alleviate my consciousness, but I'm not. = Unlike most of them, I do not consider the CO2 emissions the only one or = the major problem driven climate change.
I'm still concerned with habitat losses; someone stated that there are = probably more people in USA than in Brazil. Considering for a moment = that this is true, and how about the carrying capacity??? I wonder if = the biomes and habitats of the North America could absorb more humans = than the environment here in Brazil. That's seems unreal?? Not so, let's remember that the species ranges are = in general very smaller in the tropics than in the temperate regions = (Rapoport's rule), the species richness is higher and also the = complexity of the biotic interactions is both higher and more = species-specific. Some months ago a paper in Nature was published = suggesting that disturbance in diverse and complex mutualisms nets are = more prone to lead to species extinctions than nets with few species. I = think that are to much environmentalist's statements here that lacks an = ecological scientific framework behind. Brazil isn't only the huge and wild Amazon. We have (yet) another type = of rainforest bordering all the Atlantic Coast (more than 8.000 km) = somewhat different from the Amazon in species and processes. It was 90% = cleared due to population growth and land use. Now, if you had the patience to read all this, please, do a search in = the 'web of science' or in the 'google scholar' and see how many papers = you will find about the role of the rainforests in the global carbon = balance and the effects of forest clearing on the rise of the = atmospheric temperature. All the best ----------------- Osmar=20
