But a new study shows giving buses an inexpensive engine retrofit helps not only the health of students who ride them, but also their academic performance. The study looked at a variety of school districts over time and concluded that test gains from green buses were like going from a rookie teacher to one with more than five years of experience.

Some bullies never grow up, and just keep on bullying. Experts describe where and how it most often occurs, what workplace bullies are seeking, who they target, why it continues, and what needs to happen to stop it.

The average age when men first become fathers has risen to 31, and more men are also becoming dads in their 40’s and 50’s. A National Book Award-winning author discusses his experience as a first-time dad at 56, and now as a 73-year old father with teenagers.

The HPV vaccine can prevent about 92 percent of those cancers, but only about half of adolescents receive it. Now, two new studies in the journal Pediatrics could provide reassurance that the HPV vaccine is safe. Reviewing 28 million doses, researchers say 97 percent of side effects are minor ones like headache and dizziness. The vaccine is recommended for routine vaccination at age 11 or 12.

Studies show that law enforcement is the most sleep deprived of all professions, with potentially damaging and even fatal consequences for decision-making and reaction time, as well as long-term health damage. Experts discuss the unique challenges in having a poorly rested police force and in fixing it.

People with significantly clogged heart arteries often undergo bypass surgery or stenting procedures, but a large new study shows that drug therapy alone is often just as effective. The study presented to meetings of the American Heart Association finds that artery blockages discovered during stress tests can be managed by medication and results in no more heart attacks or deaths than in patients who received either stents or bypass surgery.

A growing number of pet owners are tempted to put their dog or cat on vegan, gluten-free or raw diets. An expert pet nutritionist and veterinarian discusses what pets should and shouldn’t eat to be healthy.

Around a half million people are homeless in the US on any given night, but the street homeless who are most visible often incorrectly influence our assumptions about the homeless. A noted researcher discusses myths and truths about their addictions, employment, residences, and more, and why people often become homeless.

Women undergoing cancer treatment often suffer hair loss and other impacts on appearance. A noted beauty expert discusses best ways to deal with it. Guests: Caitlin Keirnan, former fashion columnist & beauty director, cancer survivor and author,

A study in the Journal of Investigative Dermatology shows that people with conditions such as eczema, atopic dermatitis and psoriasis are often made miserable by itching. Those with itch were more than twice as likely to be depressed and nearly twice as likely to have suicidal thoughts as controls without those conditions.