On the global climate thing, I'm pretty utilitarian.
Do man-made emissions have an effect? Yeah, probably. Man has been changing local ecosystems and environmental influences since the beginning. (However you want to define "the beginning.")
How do we measure those effects? Poorly.
Can we reverse those effects? Probably not.
What can we do? Same as always. As we learn more, we should really try to limit those things that have (or could have) harmful effects. Conservation is a conservative value. But, we should also plan. We should plan for things to be unstable, with a trajectory that appears to be getting cooler over time. Or warmer. Depends on where the measurements are taken and when. We should try to identify what will happen and where, and build/plant/protect based on available information.
Probably best not to panic or do anything drastic.
Do man-made emissions have an effect? Yeah, probably. Man has been changing local ecosystems and environmental influences since the beginning. (However you want to define "the beginning.")
How do we measure those effects? Poorly.
Can we reverse those effects? Probably not.
What can we do? Same as always. As we learn more, we should really try to limit those things that have (or could have) harmful effects. Conservation is a conservative value. But, we should also plan. We should plan for things to be unstable, with a trajectory that appears to be getting cooler over time. Or warmer. Depends on where the measurements are taken and when. We should try to identify what will happen and where, and build/plant/protect based on available information.
Probably best not to panic or do anything drastic.