Here's an easy way to make a charitable difference -- send an instant message.

Students at 35 colleges and universities are doing it, and it's turned into a great way to create awareness and raise funds for nine nonprofit organizations.

The organizations -- American Red Cross, Boys and Girls Clubs of America, National AIDS Fund, National Multiple Sclerosis Society, ninemillion.org, Sierra Club, Stopglobalwarming.org, Susan G. Komen for the Cure, and U.S. Fund for UNICEF -- receive a portion of advertising revenue every time a student has a conversation using instant messaging (or i'm).

It's all part of a Microsoft-sponsored campus program, and students get to choose their recipient organization each time they send an instant message.

There is no cap on the amount each group can receive, and Microsoft will make a guaranteed donation of at least $100,000 to each organization during the first year of the program.

Visit www.imforacause.com for more information.

My gut hasn't always guided me through life's most difficult decisions and dilemmas. It wasn't until I felt a lump in my breast more than two years ago that my gut kicked into gear and told me something very important.

"It's cancer," my insides told me one week before the surgeon who did my biopsy called.

"It's cancer," the surgeon said. I didn't tell him, but I thought it: "I know."

I also knew prior to surgery that my cancer had not spread to my lymph nodes. My gut told me this too. It also told me the chemotherapy drug Taxol was not right for me -- since my cancer had not spread -- despite the urging of one oncologist that I accept this treatment. I would have gone on gut instinct alone in my rejection of this medication but another doctor weighed in and agreed with my gut, so I had solid backing on this decision.

Many have dismissed hunches like these and have written off those who believe in them as screwballs, says writer Chip Brown in the March 2007 issue of The Oprah Magazine. But as Brown shares after peering into the world of gut instinct, there are 100 million nerve cells in the gut. They run on autopilot, regulate digestion, play a critical role in the body's immune system, and control mood-altering neurotransmitters identical to those in the brain.

The gut is essentially a second brain. It was a "gut feeling" that led Fred Smith, founder of Federal Express, to begin exploring the possibilities of overnight delivery and Howard Schultz, founder of Starbucks, to begin mass marketing coffee. Wall Street professionals make millions on their gut feelings, sportscasters make startling predictions based on gut guidance, and entrepreneurs launch thriving businesses because of the inklings that rumble in their tummies.

You may or may not be a gut thinker yourself. But I've stumbled upon a gut exercise -- thanks to psychotherapist Nancy Napier --and I'd like for you to consider it the next time you find yourself stuck at a crossroads, unsure of where to turn. You never know, the direction you seek may be swirling around in your midsection, just waiting for a call to action.

Think about this:

You are wavering between two choices. Find yourself a quiet, serene place where there will be no disruptions. Now sit down. Take a moment to settle and focus on the issue you want to explore. Then choose one side. Think about this side and notice what happens in your gut. Do you feel a tightening and gripping or a softening and warming? Are the sensations pleasant or uncomfortable? Notice your thoughts. Are they positive or negative? Give yourself some time to feel your gut and your mind responding.

Now shift to the other side. Think about the previous questions, and try to chart what your body gut is saying.

While you may not get a gut answer at first, if you come back with the question several times, you'll likely hear just what your gut wants you to know.

Environment Canada meteorologists are warning people who enjoy spending time in the sun to do less so this year. As the ozone layer continues to thin, the danger for sunburn, cataracts and skin cancer continues to increase. The ozone layer is not protecting us from the sun's harmful ultraviolet radiation as much as it once did.

According to Environment Canada, the ozone layer across Canada has decreased by four to eight per cent over winter and spring, and the more sunny days there during the summer season, the more skin cancer risk to those who spend time outdoors.

Counting on sunscreen lotion to protect from the damaging rays of the bright day sun is no longer sufficient. Skin cancer experts insist, to be safe, stay out of the sun from 10 a.m. to 4 p.m. -- if you must be outside -- stay in the shade. Wear a wide-brimmed hat and quality sunglasses that offer protection from UVA and UVB radiation, and a long-sleeved shirt. Gone are the care-free days of walking out the door in shorts and a summer top, to spend the day enjoying the warmth and brightness of a summer day. Or, for sun worshippers, a day basking in the sun to achieve the golden tan.

What is hanging so toxic in the air? According to the latest data from the U.S. Environmental Protection Agency, benzene from cars and trucks that burn gasoline or diesel fuel. Other toxins causing higher risks for cancer where air pollution is the worst are naphthalene and acetaldehyde -- also from vehicles.

Autoblog, one of our sister blogs, has launched AutoblogGreen, which will feature posts on living an eco-friendly lifestyle in all things auto-related in green car culture. They will be keeping a close ear to the ground and fingers to the keyboard to give readers an up-to-the-minute accounting on the auto industry's efforts to create transportation that is fuel-efficient and cleaner for the environment.

From our perspective here at The Cancer Blog, transportation going green means a giant step towards a cancer prevention environment. From air pollution to alternative fuels, check AutoblogGreen out! It's a very cool, forward-thinking blog.