I guess what I was trying to say, is that we need to focus on certain things before we focus on others.
1. Humans have been destroying species they have "no need" for. But one day, our children may want to see what those species looked like, and how they lived. Before we continue this wanton destruction, we need to perfect animal cloning, and cloning from dead cells, so that we can bring back to life species that would only exist in special areas set aside for them. (I'm talking those zoos that actually make an accurate habitat for the animals, not the ones where it's a joke of a habitat)
2. Ways to decrease our pollution need to be sought. And we have to think about what the effect of that will be on the environment. Example: the cars where they run on corn and release water. When we're releasing 9,000 tons of water, what do we do with it all? If we put it back into the planet, we'll dilute our oceans, but how can we keep that from happening? Make it safe to drink, and it gets released into the planet via our urine. Put it in fountains, and it gets released into the planet through evaporation and the weather cycle. Put it on a space station? but then anyone who drinks on the space station will carry it back onto earth.
3. Streamlining our food production. Make it so that we're producing food that's actually good for us, instead of mountains of corn. Then make it so that we can bring this food throughout the world. Finding ways of growing a lot of food in small spaces. I watched a ted talk that showed that the human race will stabilize at 10 billion people. We need to be thinking how to feed, clothe, and house 10 billion people with the space available on the planet. Or getting space stations that can help with one or the other problem up and running.
4. Diseases need to be cured. This is such a huge problem, but it must be done. What's the use in living 80 more years if it just means 80 years of chemo for those with cancer? The drug system needs to be overhauled, with better trials. They should probably make a law that patents on drugs can't be taken out just for tweaking the formula a bit, that they have to demonstrate the new drug is better than the old drug, not just better than a placebo, in some way (like less side effects, faster treatment, longer treatment, whatever, but SOMETHING different about the effects of the drug, not the ingredients). Or if it's treating something that we don't have a treatment for yet (though I don't know of anything like that!)
Until we find the solutions to these problems, I don't think we should be seeking to lengthen our lives all that much. Of course, better education will help in finding solutions to those problems, because the more people who know what we already know, the more people who can be involved in finding a new/better solution.