Decide which of these statements are fact or opinion: 1. We, the cattle, the sheep, pigs and pets that we...

Decide which of these statements are fact or opinion:
1. We, the cattle, the sheep, pigs and pets that we raise, make up 95% of mammals on Earth.
2. The effect of deforestation is devastating.
3. Cutting down trees is necessary to make space for mammals that feed our growing population.
4. The two men cut down 90 hectares of land every 90 days.