Chemicals!
Do you still remember that pro-life/Obama inauguration picture from earlier? This is sort of like that in how the OP took a picture and added their own context to it. Without researching, you’d probably think that there was some truth to this. After all, someone spraying crops with pesticides and chemicals would want to be a full-body suit, right?
Well, it turns out that large-scale farms don’t actually spray their crops individually. And also, this isn’t a farmer spraying crops at all. It’s a Greenpeace member spray-painting crops in protest of GMO practices and whatnot. If anyone is adding harmful chemicals to plants here, it’s the protester.