California Orcutt grass is a small, hairy annual grass sometimes forming small tufts or mats. It was listed as endangered in 1993, and ongoing threats to the species include habitat loss and degradation due to urbanization and agricultural activities, off-highway vehicle use, fire and suppression activities, non-native species, small population size and climate change climate change
Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century humans have had an unprecedented impact on Earth's climate system and caused change on a global scale.

Learn more about climate change .