The plume probably results from wildfires in canada .

那可能是由发生在加拿大的野火造成的。

Wildfires are certainly a problem in brazil .

森林野火的确是巴西的一个大问题。

Wildfires have directly killed at least 54 people and left thousands homeless .

野火已直接导致至少54人丧生，几千人无家可归。

The second is : how much carbon do such wildfires release into the atmosphere ?

第二个是：这样一场森林野火将会向大气排放多少碳？

The size of deserts would increase , along with the frequency and intensity of wildfires .

沙漠范围会增大，并且野火发生的频率和强度也会上升。