Why do environmentalism, green living, conservation, etc. have such politics?

It seems to be this stereotype that all conservatives hate the environment and all liberals hug trees no matter how many contrary examples are shown. Why do one’s political views have to affect how he feels about the environment? Shouldn’t it all be scientific/moral/ethical than based around politics?
What if the rest of my political views don’t match these other "green" parties?

What about the evironmental policies of conservative groups that are very green?

What about liberals who don’t care about the environment?

I’ve yet to see an answer that looks beyond stereotypes to real world cases.