We're suffering from a human overpopulation explosion.  It took millions of years for there to be one billion people on the planet in 1804.  Now, there are about 6.7 billion of us and a lot of dead species under our feet and a lot more going out the door.  It doesn't take a rocket scientist to figure out that by 2040, we're never going to find a parking spot, let alone get a job or something decent to eat.

Why People Are Idiots

The easiest solution to human overpopulation is to not have babies until things settle down.  But will people do that?  Hell, no.  They think it's not right to be forced into doing anything - even though every plant and animal (including other people) has to suffer the consequences because someone couldn't keep their pants zipped or were denied access to contraception.

People like to be lazy.  Deciding not to have any more kids takes too much work.  Also, the rich need a lot of poor people in order to walk on in order to stay rich.  Besides, if there's a simple solution, then it must not work.  But if the solution is really, really complicated, then people will go for it.  So, the most practical thing to do to fight overpopulation is to not appeal to people's logic but present to them a solution that's as convoluted as possible.

So, how can we do this?  Through the wonders of genetic science, which offers not one, but two possible solutions.

"Congratulations, Mrs. Jones.  It's A Panda."

One of our basic drives is to reproduce.  We're funny that way.  But we don't have to ignore this drive.  Instead of incubating human children in healthy wombs, why not incubate endangered species?  Certainly science can find a way of transplanting fertilized eggs of different species into human wombs.  This way we have two problems dealt with - removing human overpopulation and raising the populations of critically endangered species.

Besides, it's much more comfortable.  The average human baby weighs seven pounds.  The average newborn panda weighs 3.5 ounces.  Newborn marsupials weigh even less.  And these animals never lose grow up to become heroin addicts, suicide bombers or (God forbid) bloggers. 

Trans-Species Genetics

Geneticists have been able to take a gene from a fluorescent jellyfish and make glow in the dark bunnies and pigs with them.  They have also been able to take a gene from a mouse and make Enviropigs--  pigs that are able to absorb phosphorous from their food, making their feces more earth-friendly.

So, let's do something like that that with us.  The Sandtiger Shark gives birth to one baby shark.  However, their wombs are full of baby sharks, but only one comes out alive.  This is due to a trait in the baby sharks called intrauterine cannibalization.  The baby sharks eat each other inside of the womb until there's only one left.

Parents of teenagers fear teen pregnancy.  Well, they wouldn't have to any more if their girls had this gene in them.

What about the boys?  We should offer them all the beer they can drink if they get a vasectomy.  They'll be lines winding around the block.

And they all lived happily ever after.

Related Reading:
Climate Projections and Global Food Supply
Anticipating Change: Building a Sanctuary for the Future