A report has revealed a potentially damaging impact of climate change.
US Interior Secretary Sally Jewell said that three-quarters of the country's national parks are experiencing 'extreme' early spring as a result of climage change, citing data which stretched back to 1901.
The conclusion was based on a report which canvassed 276 national parks.
Experts have said that this could have far-reaching impacts, such as the invasion of foreign species who might now find the environment hospitable. For instance, Shenandoah National Park in Virginia strugggles with kudzu—a scourge that exacerbated by earlier springs.
This presents a challenge to put Darwin's theory of survival of the fittest to the test - which species will adapt to a changing climate fastest?