We have no idea what's natural and what's man made. [...] There is no fingerprint of human-caused warming.

Man-made global warming was a potential serious threat, and NASA wanted Congress to fund new satellites to study the problem. It was a team effort to get that accomplished.

Nature is not static, but causes its own, internally-generated changes - both in climate and in biological systems.

It is well known that strong to violent tornado activity in the US has decreased markedly since statistics began in the 1950s, which has also been a period of average warming. So, if anything, global warming causes FEWER tornado outbreaks...not more. In other words, more violent tornados would, if anything, be a sign of 'global cooling,' not 'global warming.'

We are now at the point in the age of global warming hysteria where the IPCC global warming theory has crashed into the hard reality of observations.

We have no idea what's natural and what's man made. [...] There is no fingerprint of human-caused warming.

We see something change in our climate and we blame ourselves ... I don't think we understand what happens. We can watch it happen on the (climate) models, we know it happens, but we don't know for sure how it happens.