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Global Warming Is Back

With the economy still driving Americans' concerns, in 2012 climate change wasn't a major issue. In 2013, it will likely rise to one of the top of concerns for everyone.

In 2013, scientists are expecting more climate change events. For example, a combination of El Nino and global warming is leading some forecasters to predict that 2013 will see record-breaking global temperatures.

This year may also bring a decline in Americans' economic concerns, as the economy grows more robustly. With the economy less important, climate change concerns will return to pre-recession levels.

The media narrative is also building. This year may see a noticeable jump in stories and documentaries about the weather. For example, Showtime if lining up a high-profile documentary series ("Years of Living Dangerously") made by, and starring, A-list celebrities.

Meanwhile, companies like Unilever and IBM have been building sustainability strategies for the past few years.

Pauline S Mills | E+ | Getty Images