"How much more damage do we have to endure before we realize that it's cheaper to save this planet than to ruin it?" asks engineer and investor John Doerr. In conversation with Countdown cofounder Lindsay Levin, Doerr and systems innovator Ryan Panchadsaram lay out six big objectives that -- if pursued with speed and scale -- could transform society and get us to net-zero emissions by 2050. An action plan to solve the world's climate crisis, backed up by a proven system for setting goals for success.

Many people across the world don't have access to healthy food -- while in other places tons of food go to waste. Social entrepreneur Ndidi Okonkwo Nwuneli thinks we can take bold steps to fix this problem. She lays out what it would take to build a more equitable, sustainable food system that nourishes all people and asks us to widen our perspectives before eating our next meal.

What do companies get when they go public on a major stock exchange? The opportunity for anyone to invest, giving the company access to a bunch of cash that allows for huge growth. And...pressure to think in the short term. This can end up hurting their workers, the environment, and even their own long-term strategy. In this episode, a proposal for a new kind of stock exchange, that isn’t just trying to shift a few rules but is building a whole new system to incentivize thinking in the long term. How do you do that? When is it better to just fix what you already have? And will it work? After the talk, Modupe and Corey dig in.

Every day, tens of thousands of cargo ships, filled to the brim with goods, release heavy pollution into the air as they make their way across the ocean. In this eye-opening talk, reporter Maria Gallucci introduces a planet-friendly alternative that could fuel these globe-trotting vessels: green ammonia. Listen as she makes the case for this game-changing solution that has the potential to clean up the world's dirtiest ships.

Conventional wisdom frames the ideal career path as a linear one -- a ladder to be climbed with a single-minded focus to get to the top. Career development consultants Sarah Ellis and Helen Tupper invite you to replace this outdated and limiting model with "squiggly" careers: dynamic, open-ended growth paths tailor-made for your individual needs, talents and ambitions. A radical rethink for anyone who feels restricted and defined by the limits of the corporate ladder.

Luvvie Ajayi Jones isn't afraid to speak her mind or to be the one dissenting voice in a crowd, and neither should you. "Your silence serves no one," says the writer, activist and self-proclaimed professional troublemaker. In this bright, uplifting talk, Ajayi Jones shares three questions to ask yourself if you're teetering on the edge of speaking up or quieting down -- and encourages all of us to get a little more comfortable with being uncomfortable.

Why do we trust some companies and not others? Using real-world examples, digital trust advisor Marcos Aguiar decodes this make-or-break quality -- and offers seven tools to help leaders design a foundation of trust into their business ecosystems in order to achieve long-term success.

We negotiate all the time at work -- for raises, promotions, time off -- and we usually go into it like it's a battle. But it's not about dominating, says organizational psychologist Ruchi Sinha. It's about crafting a relationship, and understanding both your needs and the other person's. Her three key steps will help you master this essential skill. After the talk, hear author and academic Linda Babcock and our host Modupe Akinola discuss navigating these challenging conversations – and how organizations can make outcomes more equitable. We love making TED Business, and we want to make it better. So if you have a few minutes, share your thoughts at surveynerds.com/ted

The financial sector often talks of decarbonizing investment portfolios as a way to fight climate change. But portfolios can be "cleaned" without having any real impact on the problem, says investment expert Nili Gilbert. Bringing science to finance, she unpacks how investors can actually help decarbonize the world and ensure the climate transition is just, global and interconnected. After the talk, Corey discusses how many businesses are boasting climate-beneficial practices, and how you can vet their impact as a consumer.

Business in Africa is booming -- but international companies are missing out, says emerging markets expert Nomava Zanazo. Rushing in without knowing their customers, businesses underestimate Africans and make costly assumptions about their diversity, preferences and buying power. Sharing the basics about what companies need to know to succeed on the continent, Zanazo debunks four myths and misunderstandings about Africa and its citizens -- and invites businesses from overseas to share in its wealth ... once they've done their research. After the talk, Modupe talks with Ndidi Nwuneli, the co-founder of Aace Foods, a producer and distributor of West African food products. Aace Foods is a great example of a company that is following Zanazo's advice for how American companies can do business well with African consumers.