Robert Q. Riley Enterprises: Product Design & Development
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Greenhouse Emissions & Global Warming
Source of U.S. CO2 Emissions
Global Carbon Emissions 1820 to 2020

Greenhouse emissions sources
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Preserving the health of our planet is a big factor driving the search for new transportation technology.  Petroleum motor fuels produce harmful emissions, not the least of which is emissions of greenhouse gases.  There are lots of other problems caused by harmful emissions - damage from acid rain, respiratory problems and increased health care costs due to air pollution - but global warming is potentially the most disastrous.

Carbon dioxide (CO2) is the most the most troublesome greenhouse gas that comes from human activities - mostly from burning hydrocarbon fuels.   From the last ice age until the industrial revolution in the last century (about 10,000 years), the atmospheric level of CO2 had varied only about 5%.  But beginning with the industrial revolution and projecting forward to about 2030, the amount of atmospheric CO2 will have doubled - all in about 150 years time.

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