It is clear that there are far cheaper fuels -- efficiency, solar and wind to replace coal and natural gas in the U.S., and biofuels or electricity elsewhere to reduce oil intensity. So how much $100 fossil fuel can the world afford, climate aside?

From Becky Oskin, OurAmazingPlanet Staff Writer: Most of Earth's carbon clusters deep beneath the surface, in hot mantle rocks that churn below the...

Leaders from the business community made one thing clear when they came together on Wednesday to announce a 100-day corporate campaign in support of c...

By Jessica Camille Aguirre, OnEarth Back in college, I developed an oozing poison ivy rash all over my neck and arms and had to go on steroids -- just...

We know what's happening, and we know why. But when talk finally turns to solutions, we always hear the same refrain: We can't afford to do anything about climate change.

Because of the rapid and continuing expansion of coal-fired generation in emerging economies, particularly in China and India, determined policy action will be needed to reverse the trend of the last decade.

While many of us are taking steps to advocate for cleaner energy sources and to drive down our personal contribution to climate change, each of us will have an unavoidable carbon footprint for the foreseeable future.

On the energy front, President George Bush was one of our best presidents ever. He and Vice President Dick Cheney created an energy plan. This energy plan gave investors a direction in life.

You may hear it called black carbon or even elemental carbon. Scientists getting technical will call it the "light-absorbing part of particles suspended in the atmosphere." Let's just keep it simple and call it soot.

One of the first steps in tackling climate change is to curb greenhouse-gas emissions. The trouble is, both the public and policymakers have been slow to act on a problem they cannot physically see.

Trees help address climate change by absorbing carbon dioxide from the atmosphere and storing carbon in tree roots, trunks, and branches. And urban forests provide additional positive environmental, health and community benefits.

In 1962 Rachel Carson's treatise on pesticide use, Silent Spring not only facilitated a ban of the pesticide DDT, it kicked off a then-new environmental movement. As the world's biggest emitter of carbon emissions, is China not in need of its own "Silent Spring"?

As a few nations are passing laws and regulations to reduce carbon pollution, people everywhere are seeing the impacts of climate change on their day-to-day lives, and deniers are being forced to throw in the towel.

Climate science sounds to me like provable scientific principles that are stringently reviewed by panels of experts. With all due respect to the Chamber of Commerce, I'll look to climate scientists for global warming updates.

When engineering student Shaahin Amini magnified the chemical elements nickel, aluminum and carbon under his high-powered microscope, he was surprised...