Human Impact: Atmospheric CO2 levels exceeded 415 parts per million

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It’s clear that industrial activities have increased the CO2 concentration in the atmosphere, from a pre-industrial level of 280 ppm to the present value of over 415 ppm. This is the highest it has ever been in the existence of the human race. No legitimate (uncorrupted) scientist can look at this data and not accept the facts that the current condition is indeed man made and that we are heading toward environmental catastrophe.


Clarification

Greenhouse Effect (According to the Encyclopedia Britannica)
The atmosphere allows most of the visible light from the Sun to pass through and reach Earth’s surface. As Earth’s surface is heated by sunlight, it radiates part of this energy back toward space as infrared radiation. This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature. The heated atmosphere in turn radiates infrared radiation back toward Earth’s surface.
Although the greenhouse effect is a naturally occurring phenomenon, it is possible that the effect could be intensified by the emission of greenhouse gases into the atmosphere as the result of human activity. From the beginning of the Industrial Revolution through the end of the 20th century, the amount of carbon dioxide in the atmosphere increased by roughly 30 percent and the amount of methane more than doubled.


sources:

Data after 1958 are from the Scripps CO2 program
Site: http://scrippsco2.ucsd.edu/data/atmospheric_co2/primary_mlo_co2_record
DOI: http://doi.org/10.6075/J08W3BHW
Citation: C. D. Keeling, S. C. Piper, R. B. Bacastow, M. Wahlen, T. P. Whorf, M. Heimann, and H. A. Meijer, Exchanges of atmospheric CO2 and 13CO2 with the terrestrial biosphere and oceans from 1978 to 2000. I. Global aspects, SIO Reference Series, No. 01-06, Scripps Institution of Oceanography, San Diego, 88 pages, 2001. http://escholarship.org/uc/item/09v319r9

Data before 1958 going back 2000 years
Site: https://www.ncdc.noaa.gov/paleo-search/study/9959
DOI: https://doi.org/10.1029/2006GL026152
Citation: MacFarling Meure, C., D. Etheridge, C. Trudinger, P. Steele, R. Langenfelds, T. van Ommen, A. Smith, and J. Elkins. 2006. The Law Dome CO2, CH4 and N2O Ice Core Records Extended to 2000 years BP. Geophysical Research Letters, Vol. 33, No. 14, L14810 10.1029/2006GL026152.

Data before 1958 going back 800,000 years
Site: https://www.ncdc.noaa.gov/paleo-search/study/6091
DOI: https://doi.org/10.1038/nature06949
Citation: Lüthi, D., M. Le Floch, B. Bereiter, T. Blunier, J.-M. Barnola, U. Siegenthaler, D. Raynaud, J. Jouzel, H. Fischer, K. Kawamura, and T.F. Stocker. 2008. High-resolution carbon dioxide concentration record 650,000-800,000 years before present. Nature, Vol. 453, pp. 379-382, 15 May 2008.

The Encyclopaedia Britannica, Greenhouse effect, Adam Augustyn, Feb 13, 2019
https://www.britannica.com/science/greenhouse-effect