Perhaps aviation biggest challenge....

[dr dre]

After 30 years, we still don’t know if doubling the level of CO2 produces a 1 deg increase in temp, or 5 deg.

Explained here:

Does CO2 always correlate with temperature (and if not, why not?)

We don’t know if sea levels have risen by 1mm per year, or 3.

Yes we do:

SEA LEVEL RISE

Climate models are incapable of predicting the temperature pause that has occurred over about the last 20 years in the troposphere.

Until scientists realised that was totally incorrect:

Major correction to satellite data shows 140% faster warming since 1998

Have a look at the global warming policy foundation.

A deniers group run by an exercise coach bankrolled by fossil fuel companies? Choose a better source:

Two secret funders of Nigel Lawson’s climate sceptic organisation revealed

I’ll take my facts from these 200 internationally recognised scientific bodies:

The following are scientific organizations that hold the position that Climate Change has been caused by human action:

The science is so far from settled, it’s at a very basic level.

Science is rarely “settled”. That’s a good thing for research and application of the scientific method. But the basic facts on climate changed are well known and accepted by all credible scientific bodies (climate change is happening, is caused mostly by humans and will have serious effects on society in coming decades if changes are not made to our planet):

Is the science settled?