人类与野火：生态平衡中的斗争与共生色戒未删减片段是多少时间

　　Wildfires can be caused by natural factors such as lightning, but humans also play a large role. In California, which has witnessed some of the most widely publicized examples in recent years, a housing crisis is pushing more people into areas where fires are common. And firefighters are falling victim to PTSD, even suicide. But researchers have found that humans can play a gre... (展开全部)