400ppm history lesson for sceptic amateurs

As the daily average CO2 concentration figure exceeds 400 parts per million for the first time in millions of years, it's clear we need to start listening to scientific professionals rather than amateurs driven by phobias and commercial interests.

On Thursday last week the US National Oceanic and Atmospheric Association’s daily average CO2 concentration figure exceeded 400 parts per million at its Hawaiian sampling station. Scientists estimate that the last time CO2 levels were so high was during the Pliocene – a geological era between three to five million years ago, prior to the evolution of humans.

It brought to mind the following reader comment on Climate Spectator:

{{content.question}}

Mastercard

{{ twilioFailed ? 'SMS Code Failed to Send…' : 'An SMS verification code has been sent ...' }}

Hi {{ user.FirstName }}

Looks like you have already taken a free trial

Email is required.
Email must be a valid email.
Password is required.
First name is required.
Last name is required.
Mobile phone number is required.
You must accept the terms and conditions.

OR

We have sent you a code via SMS to {{user.DayPhone}}

please enter this code below to complete your SMS verification

We cannot send you a code via SMS to {{user.DayPhone}}

If you didn't receive SMS code please

SMS code cannot be sent due to: {{ twilioStatus }}

Please select one of the options below:

Looks you are already a member. Please enter your password to proceed

You have entered an incorrect email or password

Email is required.
Email must be a valid email.
Password is required.

Please untick this box when using a public or shared device


OR

Verify your mobile number to proceed...

Please check your mobile number below and press the Send Verification Code button. This will be used to complete your verification in the next step.

Please sign up for full access

Mastercard

Updating information

Please wait ...

Trial

Mastercard
{{ productPrice }} / day
( GST included )
Price $0
Discount -{{productDiscount}}
GST {{productGST}}
TOTAL   (inc. GST) {{productPrice}}
  • Mastercard
  • Visa

Please click on the ACTIVATE button to finalise your membership

Mastercard

The email address you entered is registered with InvestSMART.

Login or to reset your password, select Forgotten password

You have entered an incorrect email or password

Email is required.
Email must be a valid email.
Password is required.

Please untick this box when using a public or shared device


OR

Related Articles