Read the current issue of BizVoice magazine (available online today and in the mail to regular subscribers) and you will find the words green, environment and sustainability throughout. The "going green" focus features companies, communities and initiatives related to environmentally friendly products and practices. Global warming is cited as one of the reasons for action by some.

But despite an increase in the attention to global warming, the scientific debate is apparently far from over. The Heartland Institute reports that more than 30,000 scientists signed a petition "rejecting the assertion that global warming has reached a crisis stage and is caused by human activity."

The Heartland article tells one side of the story; numerous resources provide the flip side of the coin. What do you think? How serious is global warming? How big of an impact do human activities have on our environment?