Climate changes in Nigeria like drought and, flooding that causes alot of environmental changes

1973 World Aquatics Championships — 1973 edition of the World Aquatics Championships

1973 oil crisis — 1973 petroleum shortage

1973 European Super Cup — football tournament

1973 OFC Nations Cup — international football competition

1973–74 European Cup — 19th season of the UEFA club football tournament

1973 Formula One season — sports season

1973 World Women's Handball Championship — 1973 edition of the World Women's Handball Championship

EuroBasket 1973 — Basketball tournament

Eurovision Song Contest 1973 — 18th edition of the Eurovision Song Contest

1973 CONCACAF Championship — 1973 edition of the CONCACAF Championship association football competition