Concentration of CO2 in the Atmosphere
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Get charged!
The energy needed to manufacture a battery is on average 50 times greater than the energy it gives out. Cut down on batteries—use the sun! Buy solar powered equipment. Otherwise, use rechargeable batteries and a battery charger. You can now get CD or cassette tape walkmans, radios, flashlights and toothbrushes that use rechargeable batteries.
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ASES Solar: Call for Participation
 Exciting news! The Call for Participation for ASES’ 50th Annual National Solar Conference, SOLAR 2021: Empowering a Sustainable Future is OPEN. Send in your proposal(s) before January 15, 2021 at ases.org/participate2021. The conference will take place August 3-6, 2021 in Boulder, CO on the University of Colorado, Boulder campus. Contact conference@ases.org if you have any questions. See you at #SOLAR2021Boulder!
Sustainableheating.org

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I will g.e.t. back to you about this and then we can talk more…
Dave, I have talked to a number of companies to try to locate info to help you and am still working on it. As you have found out, this is not an easy task. I ask that any of you out there that have any info about this, to please let us know!