The heaviness and (not) hope of climate change - Science Friday Recap
Podcast: Science Friday
Published: 2026-03-18
Duration: 18 min
Guests: Elizabeth Colbert
What Happened
Elizabeth Colbert, a prominent environmental journalist, discusses her experiences and insights on climate change and the environment. She recalls a story from her book involving an entomologist, Dave Wagner, and the search for caterpillars using a unique method of whacking bushes with a stick. This method is part of the broader challenge of understanding caterpillar species, which play a crucial role in ecosystems by transferring energy from plants to animals.
Colbert highlights the alarming decline in insect populations globally, labeling it as an 'insect apocalypse.' Insects are vital for seed dispersal, pollination, and decomposition, making their decline a significant environmental issue. She emphasizes the need for increased awareness and action to address these declines, as they indicate broader ecological disruptions.
The episode also revisits a 2008 story about the Danish island of Samso, which successfully went carbon neutral. Colbert points out that the community achieved this through collective effort and national policies that supported renewable energy, particularly wind power. Despite the potential for other communities to follow Samso's example, few have done so, highlighting a gap between potential and action.
Reflecting on her career, Colbert shares her mixed feelings about the current state of climate action. While acknowledging technological advancements in solar and wind energy, she criticizes political obstacles that hinder progress. She notes that despite the existence of effective tools to combat climate change, political resistance remains a significant barrier.
Colbert explains that humanity is entering uncharted territory with climate change, moving beyond historical climate conditions that supported human evolution. This 'pushing into the unknown' poses risks due to the lack of historical precedence for current atmospheric changes, which complicates future predictions and responses.
Colbert's deep connection to the natural world is evident in her description of the Great Barrier Reef, which she calls a place she loves. However, she also highlights the fragility of coral reefs, threatened by rising ocean temperatures. Scientists are working on breeding heat-tolerant corals, but scaling these efforts to match the vastness of ecosystems like the Great Barrier Reef remains a daunting task.
Key Insights
- Elizabeth Colbert emphasizes the critical role of caterpillars in ecosystems, as they are a major food source for birds and other animals. Despite their importance, much about their needs and life cycles remains unknown, which poses challenges for conservation efforts.
- Insect populations are declining at alarming rates globally, a phenomenon Colbert refers to as the 'insect apocalypse.' This decline threatens ecosystems as insects are crucial for processes like pollination and decomposition.
- The Danish island of Samso successfully achieved carbon neutrality through community effort and supportive policies. Colbert notes this as an example of what can be done when collective will and strategic policies align.
- Despite technological advancements in renewable energy, political resistance in the U.S. poses significant challenges to addressing climate change. Colbert points out that while the tools to stabilize the climate exist, they are often undermined by fossil fuel interests.