This and so many other issues plague us. However, if you need to travel a long distance possibly over sea's, are you going to fly or use water transport.
If any of us fly it is wrong to complain about chem-trails while we contribute to them. Personally I do not know the break down of what is involved in the trails, But I do believe fuel or burnt fuel would be a key ingredient, how that breaks down and fall to earth where and when. I have no clue how to answer. My under standing is Aeroplane fuel and car fuel are somewhat different in their make up. That same thing happens at ground level. we do not see it so much as we are in it.

The question I have with everything, is , Yes we know the problems, Dr Kaku or others, But all those who bring these problems to the surface rarely have an underlying solution. And if that solution does fall to the eyes of someone who has the power to make a difference, more often a blind eye is turned. Not turning a blind eye will result possibly in a loss to the one who can make a difference.

I guess I am trying to say , we need some direction on solutions as well as highlighting the issue.