Too many roads.

摘要: Conservation Roads have done much to help humanity spread across the planet and maintain global movement trade. However, roads also damage wild areas rapidly contribute habitat degradation species loss. Ibisch et al. cataloged world's roads. Though most of world is not covered by roads, it fragmented them, with only 7% land patches created being greater than 100 km2. Furthermore, environmental protection roadless insufficient, which could lead further remaining wildernesses. Science , this issue p. [1423][1] [1]: /lookup/doi/10.1126/science.aaf7166