The speaker criticizes those who focus on filming slow, beautiful natural phenomena like blooming flowers, suggesting they miss more urgent and dynamic changes in the environment. Instead of capturing serene time-lapses of roses and tulips, they should be documenting the dramatic transformations in our world, such as melting glaciers and shifting ecosystems. These changes are crucial indicators of our planet's health and urgency of climate change.

Highlighting the rapid changes occurring in nature, the speaker refers to specific examples like the advancing spruce-fir forest in Canada and the shifting glaciers in Greenland. These are powerful symbols of climate change and showcase the significant alterations in habitats and landscapes. Reflecting on past events, like the receding of the last ice sheet, emphasizes the transient nature of our planet and serves as a reminder of the swift and sometimes alarming pace of environmental change.