To bring all this information together, the United Nations formed a group of scientists called the International Panel on Climate Change, or IPCC. The IPCC meets every few years to review the latest scientific findings and write a report summarizing all that is known about global warming. Each report represents a consensus, or agreement, among hundreds of leading scientists.
One of the first things scientists learned is that there are several greenhouse gases responsible for warming, and humans emit them in a variety of ways. Most come from the combustion of fossil fuels in cars, factories and electricity production. The gas responsible for the most warming is carbon dioxide, also called CO2. Other contributors include methane released from landfills and agriculture (especially from the digestive systems of grazing animals), nitrous oxide from fertilizers, gases used for refrigeration and industrial processes, and the loss of forests that would otherwise store CO2.
Different greenhouse gases have very different heat-trapping abilities. Some of them can even trap more heat than CO2. A molecule of methane produces more than 20 times the warming of a molecule of CO2. Nitrous oxide is 300 times more powerful than CO2. Other gases, such as chlorofluorocarbons (which have been banned in much of the world because they also degrade the ozone layer), have heat-trapping potential thousands of times greater than CO2. But because their concentrations are much lower than CO2, none of these gases adds as much warmth to the atmosphere as CO2 does.
In order to understand the effects of all the gases together, scientists tend to talk about all greenhouse gases in terms of the equivalent amount of CO2. Since 1990, yearly emissions have gone up by about 6 billion metric tons of "carbon dioxide equivalent" worldwide, more than a 20% increase.

Leaving for work one morning, I noticed that my newspaper hadn't been delivered yet. Since I always brought it to work, it upset me that I would have to stop at the store and pick one up. I was already running late, but figured I could make it if I hurried. This would really throw a monkey wrench into my morning though and it was putting me in a bad mood.

As I pulled into the parking lot of the store, I noticed a young man ina wheel chair at the far end of the lot who seemed to be struggling. "I'm sure he's all right", I thought, "or if he's not, someone else will stop and help him." Judging by the customers and cars that were passing him by, I guess they were thinking the same thing. I got out, and walked over to see what the trouble was.

"Is there anything I can do?" I asked.

It was then that I noticed he wasn't able to speak, and was still struggling with the chair. "Is there someone I can call for you? I said. He still couldn't give me any indication. I looked down at the chair and noticed that the clamps holding the electronic keyboard and chair controls had apparently loosened causing the equipment to slip down, out of his reach. "Is this the problem?" I said, as I pulled it back into place, hoping I wasn't doing more damage than good. I then re-tightened the clamps. His hand jerked over to the keyboard and he hit a single key. An electronic voice told me, "Thank-you." He then found the toggle control that steered the chair, turned and left.

I got back in my car and headed off to work, completely forgetting my newspaper. As I drove, I felt a gratitude come over me like I had never felt before! I was truly blessed to have the physical abilities that allow me to live a normal life. Here was this young man who relied on a mechanical chair to get him around and a voice simulator to communicate. He probably dreamed about doing all the things that I take for granted every day. I vowed from now on, not to take those things for granted anymore.

I would be grateful to God for his blessings that could be gone tomorrow. It's funny, fifteen minutes before that happened, I was whining because my morning paper hadn't arrived on time. I'm glad I was able to help the young man, but more importantly, he was able to help me gain a new perspective on my priorities in life.

4/12/2007
The happiest day in my life!