Quote:
"Concentrations of CO2 in the atmosphere were as high as 4,000 parts per million (ppm, on a molar basis) during the Cambrian period about 500 million years ago..."
"Although diverse life forms prospered in the oceans, the land is thought to have been comparatively barren — with nothing more complex than a microbial soil crust[13] and a few molluscs that emerged to browse on the microbial biofilm.[14] Most of the continents were probably dry and rocky due to a lack of vegetation."
"Currently about half of the carbon dioxide released from the burning of fossil fuels is not absorbed by vegetation and the oceans and remains in the atmosphere.[92]
Excess CO2 emitted since the pre-industrial era is projected to remain in the atmosphere for centuries to millennia,[93] even after emissions stop.
Even if human carbon dioxide emissions were to completely cease, atmospheric temperatures are not expected to decrease significantly for thousands of years.[94]"
Quote:
March 19, 2021 CBS News
Climate change returns to EPA's website
By Li Cohen
Climate change once again has a dedicated page on the Environmental Protection Agency's website. The agency relaunched the page on Thursday after the Trump administration removed the page, and all other references to global warming and climate change, when he went into office four years ago.
"Climate facts are back on the EPA's website where they should be," EPA Administrator Michael Regan said in a statement. "Considering the urgency of this crisis, it's critical that Americans have access to information and resources so that we can all play a role in protecting our environment, our health, and vulnerable communities.
Trustworthy, science-based information is at the foundation of strong, achievable solutions."
The EPA announces climate science is back on its website after being removed during the previous administration.
- Ben Tracy (@benstracy) March 18, 2021
The relaunched site has two simple messages on an image carousel on the home page: The climate crisis is an EPA priority and public understanding of the implications of the crisis are essential to addressing it.