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By Lonny Grafman
Catching rainwater around the world
Get a paperback from Amazon or free digitally at tocatchtherain.org
  • Oct 15 Urban sustainability news: It looks like the pandemic is helping us to move our business into the streets - and killing the urban car along the way [1]
  • Sep 30 Climate news: Has the world started to take climate change fight seriously? [2]
  • Sep 25 California news: Global warming driving California wildfire trends say scientists [3]
  • Sep 22 China news: Climate change: China aims for 'carbon neutrality by 2060' [4]
  • Sep 21 Climate news: World's richest 1% cause double CO2 emissions of poorest 50%, says Oxfam [5]
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Dry Steam Geothermal (USGS).

Geothermal power is generated from the high temperatures that can be found in various parts of the Earth's crust such as volcanoes, hot springs, and geysers . The high temperatures range from 225º F to 600º F and occur in these areas due primarily to the decay of radio-active isotopes that occur within the rocks of the earth's crust . The water that surrounds and fills the gaps between the rocks in the crust is raised in temperature by these natural processes. This hot water is then pumped to the surface and its steam is captured and used to create electrical power through a turbine system.

There are three common types of geothermal power: dry steam, flash steam, and binary cycle. Dry steam is rare and uses the steam directly from the earth, flash steam pumps the hot water that naturally occurs in the earth to the surface and utilizes its steam, and binary cycle uses a secondary fluid and its vapor to power a generator.

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The Spring 2017 semester of ENGR215 Introduction to Design worked with Zane Middle School to design and build sustainable and educational infrastructure and apparatuses that supports K-8 STEAM education at their Eureka, CA location.

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Ross Perot

The activist is not the man who says the river is dirty. The activist is the man who cleans up the river.

— Ross Perot
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