President Barack Obama stressed the urgency for the need to take action against climate change during his three-day trip to Alaska on Monday.

During his landmark visit to The Last Frontier state, the president warned that climate change is no longer a problem of the future, but rather a challenge that must be addressed immediately in order to save humanity in the next century.

"[It] is happening here. It is happening now," he said while speaking at the GLACIER conference in Anchorage Monday, according to Yahoo! News.

The challenge "will define the contours of this century more dramatically than any other," said Obama. "Human activity is disrupting the climate, in many ways faster than we thought."

He went on to say that the "urgent and growing" threat of man-made climate change is endangering the people and natural habit in one of the nation's last wilderness frontiers.

He also emphasized that Alaska is currently experiencing one of its worst wildfire seasons in recent history, while its glaciers are melting due to a record setting warming trend over the past several years. As a result, this has caused the permafrost that lies beneath many roads and buildings across the state to begin melting.

In addition, he noted, "Alaska's fire season is now more than a month longer than it was in 1950. At one point this summer, more than 300 wildfires were burning at once."

Meanwhile, 743 fires have destroyed 5.2 million acres in the state so far.

"The increases in wildfires are clearly linked more strongly to climate," ecosystem ecologist Terry Chapin told NBC News. "We are experiencing years with extensive hot dry periods much more frequently, so we expect years with extensive wildfire to continue to increase as global climate continues to warm in response to increased human-caused emissions of greenhouse gases."

Obama also took shots at climate change deniers, saying, "The deniers are increasingly alone, on their own shrinking island. The science is stark, it is sharpening, and it proves that this once-distant threat is now very much in the present."