3

<1

<1

Source: Council on Environmental Quality, 1993, Environmental quality, 23rd annual report, (Washington, D.C. [January]).

Note: Violation levels are based on U.S. EPA water quality criteria: FC bacteria—above 200 cells per 100 mi; dissolved oxygen—below 5 mg/l; total phosphorus— above 1.0 mg/l; cadmium, dissolved—above 10 fg/l; and lead, dissolved—above 50 fg/l. * = base figure too small to meet statistical standards for reliability of derived figures.

Source: Council on Environmental Quality, 1993, Environmental quality, 23rd annual report, (Washington, D.C. [January]).

Note: Violation levels are based on U.S. EPA water quality criteria: FC bacteria—above 200 cells per 100 mi; dissolved oxygen—below 5 mg/l; total phosphorus— above 1.0 mg/l; cadmium, dissolved—above 10 fg/l; and lead, dissolved—above 50 fg/l. * = base figure too small to meet statistical standards for reliability of derived figures.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

Get My Free Ebook


Post a comment