Edition: Singapore Indonesia Asia US/UK RIO DE JANIERO, Brazil: Brazil sold extraction rights to 19 oil and gas blocks near the mouth of the Amazon river Tuesday (Jun 17), at an auction slammed by environmentalists months before the country is to host a UN climate summit. Two consortiums, one comprising Brazil's state-owned Petrobras and US giant ExxonMobil, the other US multinational Chevron and China's CNPC, spent US$153 million on exploration and production concessions for 19 blocks on offer