The National Climate Assessment is prepared by our top scientists and is by far the largest, most comprehensive US-focused climate change report ever produced and gives in-depth look on climate change.

The findings point to humanity as the cause for this extreme weather pattern. Many independent lines of evidence demonstrate the world is warming and human activity is the primary cause.

Other changes flow from this warming, including melting of snow and ice, rising sea level, and increases in some types of extreme weather, such as extreme heat and heavy downpours.

It's Halloween, which means it is now time to put on that costume for Trick or Treating, but please keep it clean, because there have been too many dirty tricks being played out.

Dirty tricks, politics, as usual, unethical acts, illegal campaign practices or pranks intended to disrupt or sabotage the campaigns of opposing candidates, or similar practices carried out against rival countries or corporations for espionage or commercial purposes.