It really depends who you need it to be significant to for your report. The USA, the UK, other countries or the World?
1. It affected the world economy (industrial and material producing nations)
2. It lasted for about a decade
3. Crop prices doubled and agricultural industries were deeply affected (particularly Australia)
4. Mining and logging industries suffered a lack of demand and thus a mass of unemployment with few job alternatives or prospects
5. It caused global political upheaval and weakened democracy (hence the rise of Stalin, Hitler and Mussolini)
6. It resulted in global poverty and bordered on starvation
If you need to focus on a particular country or issue, then perhaps we could help further.