_____ countries researchers developed a new computer model that can help accurately predict air pollution levels in the region using certain climatic patterns related to the ocean ?

1) Japan and China
2) China and the United States
3) India and the United States
4) Japan and Russia

Explanation:
The team of researchers from China and the United States developed a new computer model that can help accurately predict air pollution levels in the region a season in advance. The data from El Niño and Antarctic Oscillation events can be used to predict air pollution levels in northern India. It will allow the government to forecast aerosol pollution conditions in winter and formulate plans for pollution control.The research was published in the journal Science Advances.