For certain traits, you cannot break things down as a ratio of genetics:environment. For example, myopia appears to be a genetically-based trait, but it also appears to be expressed much more frequently when children learn to read (which is why such a disasterous trait for a hunter-gatherer wasn't eliminated in the tens of thousands of years before literacy). In other words, the phenotype (nearsighted) is both entirely genetic and entirely environmental.
Some things are mostly genetic. Some things are mostly environmental. Some things are a mix of both. But currently, you are supposed to say that everything is both genetic and environmental (or be labelled a racist). And that is false.
Here's the new thread for posting quotes, with the usual rules: