Question

Change the verbs to nouns and begin points with them.

Answer 1

- Storage of energy from sun in coal and petroleum
- Deposit of bulk supplies 200-600 million years ago
- Abundance of microscopic forms of life in tropical conditions
- Death of microscopic life forms leading to recycling through decay
- Prevention of total decomposition by significant amount of dead plants and animals being covered with mud
- Hardening of sediments, over the years, led to rock-formation
- Production of coal, petroleum by compression of matter between rocks
- Unsuitability of present-day conditions for coal-formation