pre-industrial levels, in about 2070 according to
the IPCC's ``business as usual'' scenario, while
the combined eect of increases in CO2 and trace
gases would reach a level equivalent to doubling
pre-industrial CO2 in about 2025.
The IPCC presents results for two seasons:
December±January±February and June±July±
August. In June±July±August expected rainfall
declines by 1 mm/day in virtually all of Brazil. In
December±January±February it declines by
1 mm/day in Amazonia, increases by up to
2 mm/day in part of the Northeast, and stays
unchanged in Southern Brazil. In almost all of
Brazil (including all parts of the country where
silviculture is a signi®cant activity now or in the
foreseeable future),