Many of these topics are broad and would need to be narrowed for a speech. For example advertising could become political attack ads or tobacco ads.
Abandoned children
Abuse of animals
Abuse of children
Abuse of medication
Abuse of spouse
Abuse of the elderly
Academic dishonesty
Academic freedom
Accidents, aircraft
Accidents, fraudulent
Accidents, industrial
Accidents, prevention
Accidents, sports
Accidents, traffic
Acid rain
Addiction to drugs
Adoption of children
Adoption of wild animals
Advertising
Aerobic exercise
African killer bee
Age and discrimination
Age and intelligence
Agricultural pests
AIDS
Air bags, automobile
Air pollution
Alcohol and drugs
Alternative fuels
Alternative imprisonment
Alternative medicine
Alzheimer’s disease
Amusement parks, safety
Animal communication
Animal experimentation
Animal extinction
Animal training
Anti-theft devices for cars
Antibiotics
Antioxidants
Antismoking movement
Anxiety attacks
Aquariums
Architectural design
Art therapy
Art treasures
Assassinations
Assisted suicide
Asteroids
Astronauts
Athletes, nutrition
Athletes, psychology
Athletes, women
Auctions
Automobiles, electric
Automobiles, safety
Back pain
Bald eagle
Beekeeping
Behavior, compulsive
Behavior, Type A
Bicycles, commuting
Billboards
Biotechnology & genetics
Bird-watching
Blood banks
Blood pressure
Bombings
Bone marrow
Books and censorship
Burglary protection
Caffeine
Calcium
Cancer
Capital punishment
Car theft
Cave drawings
Cell phone etiquette
Censorship in the arts
Charities
Checking accounts
Child labor laws
Child support
Children and war
Children of AIDS patients
Children of the mentally ill
Cholesterol
Chronic fatigue syndrome
City planning
Civil liberties
Clean water
Climatic changes
Cloning
Cocaine
College athletes
College costs
College campus crimes
Common cold
Communication, family
Communication, medicine
Commuting
Computer fraud
Computer graphics
Computer viruses
Con artists
Consumer protection
Contamination of water
Coral reef ecology
Cosmetic surgery
Cosmic rays
Coyotes
Credit card fraud
Credit card misuse
Crime prevention
Criminal behavior
Cults
Day care centers
Death, accidental
Debt relief
Deep-sea ecology
Deficit spending
Depletion of ozone layer
Depression, mental
Desalinization of water
Designated drivers
Diabetes
Diagnosis, ultrasonic
Diet and nutrition
Digital music
Digital television
Dinosaur discoveries
Disaster victims
Discrimination, AIDS
Discrimination, disabilities
Discrimination, gays & lesbians
Discrimination, gender
Discrimination, weight
DNA fingerprints
Dog racing
Dolphins
Drinking and driving
Dyslexia
Earth-friendly products
Earthquakes
Elderly drivers
Electronic books
Electronic mail (e-mail)
Electronic music
Employee crimes
Endangered species
Environmental protection
Epidemics
Ethics, business
Ethics, medical
Ethnic cleansing
Euphemisms
Euthanasia
Evidence, criminal
Expert witnesses
False memory syndrome
Family therapy
Family violence
Famines
Fashion design
Fetal alcohol syndrome
Fiber optics
Fingerprints
Fire ants
Firefighting
Flea markets
Folk medicine
Food allergy
Food poisoning
Forest conservation
Forgery
Fossils
Foster parents
Galaxies
Gambling
Gardening
Generic drugs
Genetic engineering
Geothermal power
Gerrymander
Glaucoma
Global warming
Glue-sniffing
Gold discoveries
Gorillas
Government secrecy
Grand jury
Gray wolves
Great Wall of China
Green movement
Greenhouse effect
Grief
Grizzly bear
Groundwater pollution
Growth hormones
Guerrilla warfare
Gullah dialect
Gun control
Gymnastics
Habitual criminals
Hailstorms
Haiti
Hallucinations
Hallucinogenic drugs
Ham radio
Handwriting
Harassment, sexual
Hate crimes
Hay fever
Hazardous materials
Hazing
Headaches
Health care reform
Health foods
Health of workers
Hearing impairments
Heart disease
Heart transplants
Hemophilia
Hepatitis
Herbal medicine
Heredity of disease
Heroin
High blood pressure
High speed trains
Highway safety
Hijacking of automobiles
Historic preservation
HIV infections
Holistic medicine
Holocaust, Jewish
Holocaust, Native American
Home accidents
Home design
Home schooling
Homeless persons
Homeopathy
Homophobia
Homosexuality
Honeybees
Horse-racing
Housefly
Hunger
Hunting
Hurricanes
Hydrogen as fuel
Hydroponics
Hyperactive children
Hypnotism
Illegal aliens
Illiteracy
Immigrants
Immune system
In vitro fertilization
Income tax
Incurable diseases
Indoor air pollution
Industrial diseases
Industrial robots
Inequality of income
Influenza
Injuries, treatment
Insanity defense
Insect-eating plants
Insects as food
Insomnia
Insurance, car
Insurance, health
Insurance, life
Intelligence tests
International language
Internet privacy
Intolerance
Invasion of privacy
Investments
Iron deficiency diseases
Jails, overcrowding
Jet lag
Jewels
Job hunting
Job sharing
Junk in space
Junk mail
Juries
Juvenile delinquents
Kangaroos
Kidnapping, parental
Killer bees
Kleptomania
Labor disputes
Laboratories, testing
Lakes, pollution
Landfills
Landlords and tenants
Language disorders
Laser surgery
Latchkey children
Layoffs
Lead poisoning
Learning disabilities
Legalization of drugs
Libel and slander
Lie detectors
Lightning
Limousines
Living trusts
Living wills
Loans, student
Low-calorie diet
Low-cholesterol diet
Low-fat diet
LSD
Macrobiotic diet
Mafia
Magic
Mail-order catalogs
Mandatory sentences
Manic-depression
Maps
Marathon running
Marijuana
Marine aquariums
Marine pollution
Marriage customs
Mass murder
Massage
Math anxiety
Medical errors
Medicinal plants
Medicine, preventive
Melanoma
Memory techniques
Mental disorders
Mental retardation
Meteorites
Metric system
Microsurgery
Microwave cookery
Midwifery
Migraines
Migrant labor
Military weapons
Militias
Misdiagnosis
Moon, exploration
Moonlighting
Motorcycle gangs
Mound-builders
Mouth, diseases
Multiple personality
Multiple sclerosis
Murders, serial
Muscular dystrophy
Mushrooms
Music therapy
Mythology
Names, geographic
Names, personal
Narcotic laws
National parks
Naturopathy
Neo-Nazis
Neanderthals
Nicotine addiction
No-fault auto insurance
Nuclear energy
Nuclear proliferation
Nursing homes
Obsessive-compulsive disorder
Occupational therapy
Ocean dumping
Ocean fishing
Older workers
Online auctions
Online investing
Open adoption
Opium
Optical fibers
Oral tradition
Ordination of women
Organically grown food
Organized crime
Outer space, exploration
Ozone layer
Pain relievers
Pandas
Parent-child relations
Performance art
Pesticides
Phobias
Plants, extinction
Plants, medicinal
Plea bargaining
Poaching
Police, job stress
Political advertising
Pollution
Polygraphs
Poverty
Prehistoric animals
Prehistoric painting
Premature infants
Primates
Prisons
Product safety
Psychiatric drugs
Quit-smoking programs
Radiation therapy
Radio astronomy
Rain forests
Rare animals
Recovering addicts
Renewable resources
Rescue work
Robots
Satellites
Savant syndrome
Scams
Schizophrenia
Scientific fraud
Sea farming
Seafood contamination
Self-defense
Serotonin
Sick-building syndrome
Sled dog racing
Sleep, research
Smuggling
Soil erosion
Solar power
Space exploration
Spam & junk e-mail
Speech disorders
Sports injuries
Stalking
Steroids
Suicide
Sunken treasure
Survival skills
Taxes
Teenage crime
Terrorism
Tornadoes
Toxic wastes
Urban homesteading
Victims of crime
Volcanoes
Water purification
Weather forecasting
Wildlife rescue
Wind power
Women’s rights
X-rays
Year-round education
Zoological parks
This list can be as long as your imagination.