United States President Barack Obama and his Chinese counterpart Xi Jinping decided to cooperate in fighting climate change by reducing use of hydrofluorocarbons.
Obama and Xi, agreed to cooperate in fighting climate change by cutting the use of hydrofluorocarbons, HFCs, the White House said in a statement.
"The United States and China will work together and with other countries to use the expertise and institutions of the Montreal Protocol to phase down the consumption and production of hydrofluorocarbons" said in the statement.
Stating that the two countries had done most of the work in advance of the California meeting on Friday and Saturday, when the two presidents discussed climate change, US National Security Adviser Thomas Donilon said, "It was agreed that we have strong joint interests in addressing the climate issue from a lot of perspectives including sustainable economic growth."
HFCs are used in refrigerators and air conditioners.
They came into wide commercial use to replace ozone-depleting chemicals that are being phased out under the 1987 Montreal Protocol, but they are a big source of greenhouse gases that contribute to climate change.