1:38pm: Standard & Poor's has warned that even if the debt ceiling is raised, it might dock the nation's credit rating. More

Dec 23: Infotech pioneer Bob Metcalfe says the skills that helped drive the infotech revolution can do the same for energy efficiency and eco-friendly materials. More

Dec 3: The giant retailer is using its power to help the global poor and protect the planet. More

Nov 26: The Swedish furniture chain aims to save money while protecting the planet. More

Nov 14: When environmentalists work with big business, sometimes big money changes hands. More

Nov 5: Despite falling oil prices and the credit crunch, green technology investors remain bullish. More

Oct 31: The beverage giant tries to grow while making carbon cuts the real thing. More

Oct 29: The fuel cell business is coming of age, at last, led by United Technologies and FuelCell Energy. More

Oct 22: A refrigeration breakthrough from the popular ice cream maker could change the business of cooling. More

Oct 3: One of the world's biggest architectural firms looks to Mother Nature for ideas. More

Sep 26: The industrial giant and Internet powerhouse team up to promote clean energy. More

Sep 19: When he's not fighting fires, the Treasury chief has taken on two issues he says are crucial to the country's future. More

Sep 3: Wal-Mart and Tiffany are trying to clean up the gold-mining industry. Not everyone is cheering them on. More

Aug 21: Kraft Foods, Kellogg's and other U.S. food producers come under attack as demand for vegetable oil made from palm trees soars. More

Aug 12: By distributing energy-efficient stoves in Africa, JPMorgan Chase aims to reduce greenhouse gases - and increase profits. More

Aug 6: The computer maker says it has completely neutralized its carbon emissions. Here's how. More

Jul 16: A chemical used in plastic baby bottles is being driven off retailers' shelves not by regulators, but by advocacy groups, politicians and giant retailers. More

Jul 1: GE gives millions to support schools in the U.S. and healthcare in poor countries. More

Jun 17: Wal-Mart sustainability chief says the giant retailer is pushing harder than ever to go green. More

May 30: Business coalition splinters, and without widespread corporate support, the bill headed to the Senate is almost certainly doomed. More

May 27: The oil giant is thriving, but the Rockefellers, corporate reformers and environmentalists want fundamental change at its annual shareholder meeting Wednesday. More

May 22: To feed the world - without destroying it - big companies need to get smart about what they buy. More

May 15: How sharing unused processing power computer can aid the fight against world hunger. More

May 15: Regulating greenhouse gases will generate a lot of money. Who should get it? More

May 8: 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