Ideas worth spreading

Countdown Session 4: Transformation (Full session)

Hosted by Prajakta Koli and Hannah Stocking • Countdown

The world around us is mainly made of two things: nature and the materials that we extract from it. To fight climate change, we need to protect and regenerate nature and transform materials into low- or zero-carbon alternatives. Session 4 of the Countdown Global Launch, hosted by Prajakta Koli and Hannah Stocking, features Thomas Crowther, Ernestine Leikeki Sevidzem, Brent Loken, John Doerr, Hal Harvey, Karen Scrivener, Tom Schuler, Rahwa Ghirmatzion, Zelalem Adefris, Prince William and Sigrid.

The world around us is mainly made of two things: nature and the materials that we extract from it. To fight climate change, we need to protect and regenerate nature and transform materials into low- or zero-carbon alternatives. Session 4 of the Countdown Global Launch, hosted by Prajakta Koli and Hannah Stocking, features Thomas Crowther, Ernestine Leikeki Sevidzem, Brent Loken, John Doerr, Hal Harvey, Karen Scrivener, Tom Schuler, Rahwa Ghirmatzion, Zelalem Adefris, Prince William and Sigrid.

About the speakers

Prajakta Koli

Digital content creator

Prajakta Koli, aka MostlySane, is one of India's biggest digital creators with millions of followers across her social media handles.

Hannah Stocking

Creator

Hannah Stocking is a multi-talented creator entertaining millions of followers from around the world with original content ranging from comedy sketches to interview shows to educational series.

Thomas Crowther

Ecosystem ecology professor

See speaker profile

In collaboration with vast networks of ecologists around the world, Thomas Crowther works to address the global threats of biodiversity loss and climate change.

Ernestine Leikeki Sevidzem

Climate and gender activist

See speaker profile

Sevidzem Ernestine Leikeki has a drive to care for nature, foster women's empowerment and build future nature-lovers.

Engineer, investor

See speaker profile

John Doerr is an engineer, acclaimed venture capitalist, chairman of Kleiner Perkins and the author of "Speed and Scale" and "Measure What Matters."

Climate policy expert

See speaker profile

Hal Harvey works with policymakers to develop a clean energy future.

Karen Scrivener

Cement researcher

See speaker profile

Karen Scrivener researches how to make cement and concrete more sustainable.

Cement entrepreneur

See speaker profile

Tom Schuler has spent three decades advancing sustainable innovation across global industries.

Rahwa Ghirmatzion

Social and climate justice advocate

See speaker profile

Rahwa Ghirmatzion is executive director of People United for Sustainable Housing, a membership-based community organization committed to social and climate justice.

Zelalem Adefris

Social and climate justice advocate

See speaker profile

Zelalem Adefris's work in public health addresses racial health and wealth disparities, policy development and climate resilience in low-wealth communities of color.

Don Cheadle

Actor, author, director

Don Cheadle is known for his passionate performances on stage and screen, as well as his philanthropy work on climate change and human rights.

The Duke of Cambridge

See speaker profile

Protecting the natural environment for future generations is one of Prince William's key priorities.

Sigrid

Singer, songwriter

From the tiny town of Ålesund in Norway, Sigrid is a remarkable talent with a colossal mind, attitude and voice.

Learn more