It's also worth chucking into the mix that the global average temperature variation between even the strongest El Nino event and the next ordinary year is a fraction of a degree Celsius - certainly less than the rise of about 0.6C that we've seen since the beginning of the study period, in 1950.

BBC: Warm, wet - and warring?

By the definitions of this study, I've prescribed placebos.

CNN: Is your doctor prescribing a placebo?

The second highest number of foreign students in the United States come from China, and we've seen a 50 percent increase in the study of Chinese among our own students.

WHITEHOUSE: President Obama Holds Town Hall with Chinese Youth

But the real role of trees in our climate is the question that we've addressed in our study.

FORBES

"This is probably the best in terms of long-term follow study that I've seen in terms of associating dementia with depression, " said Dr. Richard Isaacson, associate professor of neurology at the University of Miami's Miller School of Medicine, who was not involved with the research.

CNN: STORY HIGHLIGHTS

And we've put in place a very comprehensive study over the course of five years -we're about a year into it - to really try to pull this apart.

NPR: Military Moves To Front Line Of Suicide Prevention

So far officials of the National Institutes of Health say they've seen no serious side effects in clinical trials and that study subjects who have been immunized have generated a good response.

CNN: Poll: Majority of adult Americans don't want H1N1 shot

It takes a lot of work and you've got to read and you've got to study all the time.

WHITEHOUSE: Take Our Daughters and Sons to Work Day 2012