Lasers

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…cut fashion patterns, to synthesize new material, and to attempt to induce controlled nuclear fusion. The powerful short laser pulse also makes possible high-speed photography with an exposure time of several trillionths of a second. Highly directional laser beams were also used for alignment in the construction of the Bay Area Rapid Transit system in San Francisco. Even though lasers do so much some cause carbon dioxide which is harmful to the environment. ------------------------------------------------------------------------ **Bibliography**