Precision and accuracy are completely different concepts. Let's explore what they really mean, and how to tell the difference. 1  Resolution is the fineness to which an instrument can be read.  Precision is the fineness to which an instrument can be read repeatably and reliably.
1980s & 90s-High Performance Plastics. 1980 - First production of linear low density polyethylene. 1980 - First Blue HDPE pressure pipes for potable water introduced into UK. 1982 - First artificial heart made mainly of polyurethane, introduced implanted in a human.
One-third of Californians already live in municipalities with plastic bag bans, including those in San Francisco and Los Angeles. EPI tracks all known bag restrictions, 133 of which are in the United States: No one is sure how long a plastic bag takes to decompose, but estimates range from 500 to 1,000 years.