1) Lowlands area especially level ones are good for human habitation, hence population and settlements Sheldon concentrated here.
2) Coastal lowlands are sources of mineral deposits such as crude oil.
3) Lowlands favour agriculture
4) lowlands favour construction of communication network such as roads, railways, airports, etc.
B two plates slide past each other
The quote states that we should be using solar energy before our limited amount of naturally occurring oil and coal runs out. Meaning; we should be proactively working towards solar power rather than to wait for our resource to run out to start.
