If the problem is too many unwanted children, there are many alternatives to abortion that are cheaper, less risky and don't involve killing an innocent life. All it really takes is a little bit of responsibility.
With the exception of rape (which I will discuss below), pregnancy is 100% preventable. That is to say, if everyone was responsible and logical, then there would be no unwanted babies. Unwanted babies start with unwanted pregnancies. Contraception stops pregnancies before they start. Since life starts at conception there is no killing of an innocent life. This is really the most logical approach to take care of things before they become a problem. If you want to take care of an ant infestation, do you just crush every ant you see? No, you take out the ant colony as the source. A ounce of prevention is worth pound of cure.
So, What is the best contraceptive? Abstinence. Believe it or not, you don't have to have sex. Despite its prevalence in culture and "raging hormones", it is a choice you make and it should be made more responsibly than it usually is. As an analogy, I really want to go sky diving. However, I don't have life insurance and my wife depends on my income and presence. Therefore I make the responsible decision and don't risk the increased chance of death from sky diving. All of the other risky activities I participate in I have insurance to protect me and my family. Anyone making the choice to have sex if they aren't ready to deal with a pregnancy is making an irresponsible choice. Abstinence is free and 100% effective (except for rape, but I said I would address that later). Although I wouldn't morally agree with it, masturbation, mutual masturbation, oral and anal sex could be done carefully in order to satisfy the hormonal urges. Either way there is a responsible, logical, and 100% effective way to prevent unwanted pregnancies.
But hey, we can't expect everyone to make the right choice can we? In that case there are ways to engage in sex a much reduced risk of pregnancy. They are cheaper than an abortion and most are available at your average OB/GYN offices. Through using oral birth control pills (1 in 200 failure rate) condoms (1 in 5 failure rate) and spermicidal lube on the condom (1 in 4 failure rate), The risk of pregnancy is 1 in 4000. Combine that with fact that women are only fertile for about half the time (1 in 2), that gives us a failure rate of 1 in 8000. That is sex every other day for 43 years, well over the average fertile length of the female life! Not to mention, who has sex that much for that long? Needless to say, pregnancy is extremely preventable even if you are having sex. Sure, its not perfect, but neither is abortion which ranges from 1% to 8% based on method. Condoms and birth control pills can often be had for free or cheaper than the $350+ price of abortions. Using multiple method of contraception is a perfectly effective and responsible way to prevent pregnancy and still engage in sexual activity.
But no method is perfect, even being extremely careful multiple methods could fail simultaneously. Heck, even if someone was irresponsible enough no to use any protection method, there are still ways to prevent pregnancy after the fact. Despite my bashing earlier, I've done some research and Plan B pills aren't that bad. They are essentially a birth control pill booster and cannot terminate an existing pregnancy. When used within 24 hours of intercourse, it is 95% effective and has no more risk than daily birth control pills. This is a bit pricier than the other methods but is still cheaper than abortion and can be found in almost any pharmacy.
But even now, what can be done. I mean there is still a chance all of these could fail. In that case you have a pregnancy on your hands, but there are still options that do not kill an innocent life. The first is adoption. Even if you have a abortion, you still have to go to a clinic and deliver a baby. Why not have a live one? If you're poor, there is free insurance from most states and WIC is available for food and supplies. If you want to be irresponsible and live your life normally you can do that too. There are families that are looking to adopt healthy children and ones that take children with disabilities as well. If you can't be bothered to find a family to adopt, some states have laws that say you don't have to take a baby home with you. If you are pregnant, there is nothing stopping you from putting your child up for adoption and the risk of delivery is not higher than that of an abortion even in high risk pregnancies.
Or you could keep the baby. Many couples choose to do this. They realize they had been irresponsible in the past and make a choice to be responsible in the future.
And then there is rape. Many people bring up this argument and it is a valid one. However, in the case of rape, you are still able to take a plan B pill, put the baby up for adoption or keep it and raise it. My nephew was conceived from a rape and my sister-in-law chose to keep the baby because she wanted to be responsible and take care of the life inside of her. Even if she didn't want to she could have put it up for adoption. As a single mother in college, it was a tough choice, but she still graduated and now has a wonderful 5 year old.
Any way you look at it, there are responsible ways to prevent and deal with pregnancies that do not involve killing an innocent life. Even if you are irresponsible somewhere along the line, there are plenty of chances to make the responsible choice. All of the available choices are just as safe, cheap and effective, if not more, than abortion.
Therefore anyone making the choice to have an abortion is making an irresponsible choice and killing an innocent life to deal with it? Can you honestly justify this? What other situation can you justify killing an innocent life to make up for an irresponsible choice?
How can you say that killing an innocent life is the responsible choice? There are other choices that are more responsible and logical as well as being having equal or less risks and costs.