Clearly, China and India already compete over finite sources of oil and gas.

The uses and range of the cannon and cannonballs vary over different sources.

The tax would favor renewable energy sources and nuclear power over other sources.

The iron mine was abandoned after losing advantages over other less expensive sources.

The dust devil is able to sustain itself longer by moving over nearby sources of hot surface air.

Knowledge of and control over local sources of water is expected to play a vital role in continuing conflict in that area.

Why do they choose social Q&A over other sources to look for information?

At certain points, the player is given control over light sources in the foreground which can be moved to alter the layout of the level.

This lab contains over 500 artifacts and primary sources.

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