Why is that so odd? This is that weird belief that you have to be for, or against, everything a candidate stands for.
There is no reason why somebody can't agree with one policy and disagree with another. There are lots of people (probably close to those 74 million) that agreed with some of Trump's policies but thought he was an ass and there are lots of people that agree with some of Biden's policies but may not like him.
Because the only people who are against environmental protection and regulation to that effect are either morons or the people who are profiting off of raping our planet's resources.
Every person living on the earth, if not morally corrupt, should be pro-environment.
And I'm not talking about the bullshit "personal responsibility" environmentalist wacko stuff, I'm talking about top down large scale measures to reduce emissions of harmful chemicals and the protection of the natural environment. (e.g. Container ship emissions, commercials emissions control)