ecology困难

Though often viewed as a problem for western states, the growing frequency of wildfires is a national concern because of its impact on federal tax dollars, says Professor Max Moritz, a specialist in fire ecology and management.

火灾生态与管理专家马克斯·莫里茨教授说，尽管日益频繁的野火常被视为西部各州的问题，但由于它对联邦税款的影响，这已成为一个全国性的问题。

severely damaged the ecology of western states.

严重破坏了西部各州的生态。