4:45am: The fast-food giant and Fiji Water claim customers are protecting Mother Earth when they buy taquitos and bottled water. Nice try. (more)

May 1: Kohlberg Kravis Roberts strikes partnership with the Environmental Defense Fund. (more)

Apr 18: Why a Wall Street firm wants to save a forest in Sumatra. (more)

Apr 16: Climos wants to add iron dust to oceans to capture greenhouse gases from the air. (more)

Apr 8: How Marriott will try to protect the Amazon and prevent deforestation by paying locals not to cut down trees. (more)

Mar 27: From corn-based beer cups to flex-fuel team cars, pro baseball is going green. (more)

Mar 21: The coffee giant wants to help farmers tap into the fast-growing $70 billion carbon credit business. (more)

Mar 14: GE's Jeff Immelt and Wal-Mart's Lee Scott fend off conservative attacks on their environmental policies. (more)

Mar 12: In pledging $100 million to help women around the world, Goldman Sachs CEO Lloyd Blankfein wants his firm to embrace do-gooding in a way that is defensible to shareholders. (more)

Mar 7: In a Persian Gulf desert, a U.S. engineering firm drives clean tech forward. (more)

Feb 26: You know that green concerns are mainstream when even Procter & Gamble - maker of heavily packaged goods - say they want to be sustainable. But can they really do it? (more)

Feb 22: Cherokee Investment Partners buys contaminated industrial properties and turns them into green communities. (more)

Feb 14: Widespread perceptions of corruption and violence do not deter some Western firms from putting money into African nations - often with impressive results. (more)

Feb 7: Concerns about the environment, fair trade and health are changing the way that the U.K. eats. (more)

Feb 1: The famed garbage collectors are reinventing themselves as an environmentally conscious company. Is it real or hype? Marc Gunther goes on a tour. (more)

Jan 24: Environmentalists and politicians are turning up the heat on coal plants proposed by the investment giant. (more)

Jan 17: Enterprise-Rent-A-Car wants to do its part to save Mother Earth. But there's only so much it can do. (more)

Jan 10: The 23rd edition of the iconic basketball shoe is the first one shaped by Nike's environmentally-friendly approach. (more)

Jan 4: It began with two friends and seven cows, but today Stonyfield's organic is the third largest yogurt company in the United States - and the big food firms are playing catch-up. (more)

Dec 28: Today's CEOs are accountable to no one, says shareholder activist Bob Monks. (more)

Dec 20: Andy Karsner says the new energy bill will disrupt business - and that's a good thing. (more)

Dec 13: It's great if companies announce environmentally friendly policies, but the effect on the planet isn't always guaranteed. (more)

Dec 6: While all eyes are on India and China, the technology giant sees business opportunity in the expanding economy of the world's poorest continent, says Marc Gunther. (more)

Dec 3: If it's not good for the planet, it's not on the menu at Washington, D.C. seafood eatery Hook. (more)

Nov 29: New study outlines ways that the United States can reduce greenhouse emissions by up to 50 percent, without crippling the economy. (more)

Nov 28: Activists led by Mia Farrow are trying to link the 2008 Beijing Olympics to 'genocide' in Sudan. So far, corporate sponsors aren't pulling out. (more)

Nov 16: Results from the giant retailer's audit of its social and environmental practices show just how hard it is to grow a company and be eco-friendly at the same time, writes Fortune's Marc Gunther. (more)

Oct 15: Student inventors are gathering at the Solar Decathlon in Washington to vie for the top prize and create a new generation of green homes. (more)

Oct 11: Hotels, cruise lines and tour operators are making a big mistake by not doing more to fight global warming, writes Fortune's Marc Gunther. (more)

Oct 3: Now that his dairy company has settled charges that it violated organic food standards, Aurora president Mark Retzloff wants to muzzle foes. Fortune's Marc Gunther reports. (more)

Sep 20: RecycleBank pays people to recycle. Fortune's Marc Gunther takes an inside look at the company's plan to help save Mother Earth - and profit along the way. (more)

Sep 13: Silicon Valley startup Ausra says it can generate cheap, reliable electricity from the sun. Fortune's Marc Gunther looks at whether solar power's day has finally come. (more)

Sep 4: The government says one of the nation's largest producers of organic milk has been breaking the rules, says Fortune's Marc Gunther. (more)

Aug 30: To critics, 'clean coal' is an oxymoron. To NRG Energy CEO David Crane, it's the future. Fortune's Marc Gunther reports. (more)

Aug 22: The electronics giant says it will take back all Sony products at no cost to consumers. Will rivals follow? Fortune's Marc Gunther reports. (more)

Aug 15: News Corp.'s campaign against global warming includes free light bulbs, subsidized hybrids and babes in green, reports Fortune's Marc Gunther. (more)

Aug 10: An environmental group targets chlorine manufacturers that release mercury into the atmosphere. Fortune's Marc Gunther reports. (more)

Aug 1: A South Carolina biotech firm re-engineers trees to make them grow faster and cleaner, says Fortune's Marc Gunther. (more)

Jul 25: General Electric's new eco-friendly credit card might have good intentions behind it, but spending money to save the planet doesn't make sense, writes Fortune's Marc Gunther. (more)

Jul 24: From General Motors to Google, more companies are agreeing to protect transgender people from discrimination. Fortune's Marc Gunther reports. (more)

Jul 13: An Internet community grows around the idea that one man's trash is another's treasure, reports Fortune's Marc Gunther. (more)

Jun 28: When big companies want advice on the environment, many call Green Order, reports Fortune's Marc Gunther. (more)