When playwright David Finnigan staged a play titled "Kill Climate Deniers" in 2014, he knew it'd get a strong reaction. What he wasn't prepared for was the idea that the blowback might actually cause him to rethink his own response to climate change. But as he shares in this delightfully engaging talk, his conversations with skeptics of all stripes ultimately taught him a fresh and fascinating lesson about how we can all think about — and act upon — the climate crisis.

What does it actually take to make meaningful change? Conservationist Kristine McDivitt Tompkins and playwright and theater director Amir Nizar Zuabi reflect on the deep connection between human suffering and environmental degradation and the community-building power of art to raise awareness. With equal parts hope and concern for the future, they speak to the urgent need to act now — and emphasize the transcendent power of compassion-fueled collaboration. (This conversation is part of “TED Intersections,” a new series featuring thought-provoking conversations between experts exploring ideas at the intersection of their experience.)

We waste a staggering one trillion dollars worth of food each year, significantly contributing to greenhouse gas emissions and the climate crisis. Food waste expert Dana Gunders shares innovative solutions to reduce waste — from solar-powered cold rooms to apps that sell discounted restaurant leftovers — and shares tips on how you can keep good food from going to the trash.

How do you get what you want out of a negotiation? United Nations negotiation trainer Alex Carter says the best methods center on recruitment, not rivalry. Whether you're asking for a raise or resolving a family dispute, she offers five simple tips for a successful discussion — starting with one powerful question.

What can acting reveal about the mystery of consciousness? Actor and producer Yara Shahidi and cognitive neuroscientist Anil Seth unpack the surprising ways that portraying different characters can reveal insights about our authentic selves — even if we're not actually performing onstage or onscreen. Explore the intersection of consciousness and identity and discover how our brains and bodies work in tandem to form our understanding of ourselves. (This conversation is part of “TED Intersections,” a series featuring thought-provoking conversations between experts navigating the ideas shaping our world.)

Many of the jobs that keep the world running — like cleaning bathrooms, picking up trash, caring for the elderly — pay so poorly that workers can barely make ends meet. Nonprofit leader Zeynep Ton is intent on changing that, showing why everyone wins when companies pay their people livable wages and offer opportunities for growth.

Drawing on her research into the science of play, evolutionary biologist Carole K. Hooven delves into how testosterone impacts the body and brain, interacting with culture to create differences in human behavior — starting with why boys tend to prefer rougher play than girls.

How do you find yourself when you belong to two seemingly opposing cultures? Embracing the paradoxes of dual identity, creative disruptor Farhad Mohit explores how being both Iranian and American allows him to navigate the tension between independence and interdependence, progress and presence — and to live fully in the here and now.

When we avoid feeling awkward, we often miss an opportunity for growth, says workplace performance expert Henna Pryor. She shares tips on embracing discomfort for the sake of self-betterment and shows how pushing past the "cringe chasm" — the gap between how we perceive ourselves and how others see us — can open up chances to get ahead at work and in life.

The basic infrastructure that controls plumbing, electricity and more is vital to your individual agency, says engineering professor Deb Chachra. She offers a crash course on how these systems connect to shape our lives — and suggests some key improvements for providing long-term, sustainable energy to everyone.