Jumbled sentences.

1. extinction / crisis / explosive / an / consumption / had led / growth and / an

2. that have / Earth's history / mass extinctions / the / threatens / periodically during / occured / the / and / to surpass

The required sentences are:

- An explosive growth and consumption had led to an extinction crisis.

- And threatens to surpass the mass extinctions that have occurred periodically during the Earth’s history.

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