The US and Brazil have unveiled ambitious energy goals in a sign of growing co-operation after a spying scandal damaged ties two years ago.
US President Barack Obama and Brazilian President Dilma Rousseff announced plans to up the amount of energy they use from renewable sources by 2030.
Ms Rousseff cancelled a trip to Washington in 2013 after claims the US had been listening to her phone calls.
Speaking on Tuesday, she said she had faith that such monitoring had stopped.
“The US government have stated on several occasions that they would no longer engage in intrusive acts of spying on friendly countries,” Ms Rousseff told reporters after meeting Mr Obama at the White House.
“I believe President Obama,” she said, adding that he would ring her if he wanted to know anything.
The leaders of the two biggest economies in the Americas said they were pledging to generate 20% of domestic electricity from renewable resources by 2030.
“These are very ambitious goals, a near tripling for the United States and more than double Brazil’s current output,” President Obama said at a joint news conference.