The rodent population in six Peruvian regions has ballooned due to unusual weather patterns, Reuters reported on Tuesday, saying the government has declared a state of emergency to control the plague.

• 周二路透社引据美国肺脏协会的话说，虽然美国的天气没有像以前那么烟雾弥漫，但是东部地区空气中的煤灰颗粒却在增加。