This could be something like people planting fifty trees in the city park. Education and Health earn a lot of television coverage these days. The first one is because everyone is concerned about kids. The second is because television news viewers are disproportionately middle-aged. They have an increased interest in health information and issues.
Celebrities always get television time.
The reasons are obvious. The man or woman who couldn't care less about the other topics mentioned will always look up when the local NBA star or visiting movie star comes on. I will awkwardly lump sports into this category as well. Finally, television loves novelty. Some experts say that anything visual and original will get on.